./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20/figure1-alt.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/figure1-alt.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 c47301711640656e953583ae3e13b3c9f81433cc ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-03 12:09:42,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-03 12:09:42,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-03 12:09:42,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-03 12:09:42,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-03 12:09:42,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-03 12:09:42,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-03 12:09:42,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-03 12:09:42,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-03 12:09:42,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-03 12:09:42,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-03 12:09:42,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-03 12:09:42,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-03 12:09:42,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-03 12:09:42,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-03 12:09:42,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-03 12:09:42,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-03 12:09:42,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-03 12:09:42,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-03 12:09:42,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-03 12:09:42,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-03 12:09:42,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-03 12:09:42,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-03 12:09:42,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-03 12:09:42,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-03 12:09:42,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-03 12:09:42,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-03 12:09:42,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-03 12:09:42,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-03 12:09:42,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-03 12:09:42,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-03 12:09:42,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-03 12:09:42,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-03 12:09:42,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-03 12:09:42,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-03 12:09:42,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-03 12:09:42,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-03 12:09:42,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-03 12:09:42,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-03 12:09:42,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-03 12:09:42,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-03 12:09:42,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-03 12:09:42,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-03 12:09:42,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-03 12:09:42,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-03 12:09:42,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-03 12:09:42,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-03 12:09:42,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-03 12:09:42,769 INFO L138 SettingsManager]: * Use SBE=true [2021-10-03 12:09:42,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-03 12:09:42,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-03 12:09:42,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-03 12:09:42,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-03 12:09:42,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-03 12:09:42,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-03 12:09:42,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-03 12:09:42,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-03 12:09:42,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-03 12:09:42,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-03 12:09:42,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-03 12:09:42,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-03 12:09:42,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-03 12:09:42,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-03 12:09:42,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-03 12:09:42,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:09:42,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-03 12:09:42,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-03 12:09:42,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-03 12:09:42,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-03 12:09:42,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-03 12:09:42,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-03 12:09:42,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-03 12:09:42,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c47301711640656e953583ae3e13b3c9f81433cc [2021-10-03 12:09:43,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-03 12:09:43,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-03 12:09:43,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-03 12:09:43,243 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-03 12:09:43,244 INFO L275 PluginConnector]: CDTParser initialized [2021-10-03 12:09:43,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c [2021-10-03 12:09:43,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca3b83830/9886bfe7266f4346b73596762185ec27/FLAGa40899976 [2021-10-03 12:09:44,035 INFO L306 CDTParser]: Found 1 translation units. [2021-10-03 12:09:44,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c [2021-10-03 12:09:44,036 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:09:44,036 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:09:44,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca3b83830/9886bfe7266f4346b73596762185ec27/FLAGa40899976 [2021-10-03 12:09:44,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca3b83830/9886bfe7266f4346b73596762185ec27 [2021-10-03 12:09:44,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-03 12:09:44,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-03 12:09:44,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-03 12:09:44,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-03 12:09:44,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-03 12:09:44,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1bb118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44, skipping insertion in model container [2021-10-03 12:09:44,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-03 12:09:44,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-03 12:09:44,558 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:09:44,600 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/figure1-alt.wvr.c[1029,1042] [2021-10-03 12:09:44,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:09:44,615 INFO L203 MainTranslator]: Completed pre-run [2021-10-03 12:09:44,628 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:09:44,638 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/figure1-alt.wvr.c[1029,1042] [2021-10-03 12:09:44,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:09:44,667 INFO L208 MainTranslator]: Completed translation [2021-10-03 12:09:44,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44 WrapperNode [2021-10-03 12:09:44,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-03 12:09:44,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-03 12:09:44,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-03 12:09:44,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-03 12:09:44,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-03 12:09:44,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-03 12:09:44,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-03 12:09:44,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-03 12:09:44,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-03 12:09:44,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-03 12:09:44,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-03 12:09:44,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-03 12:09:44,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (1/1) ... [2021-10-03 12:09:44,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:09:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:44,857 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) [2021-10-03 12:09:44,879 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 [2021-10-03 12:09:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-03 12:09:44,954 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-03 12:09:44,954 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-03 12:09:44,954 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-03 12:09:44,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-03 12:09:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-03 12:09:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-03 12:09:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-03 12:09:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-03 12:09:44,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-03 12:09:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-03 12:09:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-03 12:09:44,958 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-03 12:09:45,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-03 12:09:45,450 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-03 12:09:45,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:09:45 BoogieIcfgContainer [2021-10-03 12:09:45,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-03 12:09:45,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-03 12:09:45,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-03 12:09:45,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-03 12:09:45,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 12:09:44" (1/3) ... [2021-10-03 12:09:45,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c0469b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:09:45, skipping insertion in model container [2021-10-03 12:09:45,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:09:44" (2/3) ... [2021-10-03 12:09:45,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c0469b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:09:45, skipping insertion in model container [2021-10-03 12:09:45,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:09:45" (3/3) ... [2021-10-03 12:09:45,465 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1-alt.wvr.c [2021-10-03 12:09:45,472 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-03 12:09:45,473 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-03 12:09:45,473 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-03 12:09:45,474 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-03 12:09:45,533 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,534 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,534 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,535 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,537 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,537 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,538 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,538 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,539 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,539 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,540 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,540 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,542 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,543 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,545 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,545 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,546 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,546 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,548 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,549 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,549 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,549 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,549 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,550 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,550 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,550 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,550 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,551 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,552 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,553 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,554 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,555 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,556 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,557 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,566 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,567 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,568 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,576 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,576 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,580 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,581 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,581 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:09:45,609 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-03 12:09:45,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-03 12:09:45,682 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 [2021-10-03 12:09:45,683 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-03 12:09:45,702 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-03 12:09:45,717 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 72 transitions, 160 flow [2021-10-03 12:09:45,721 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 72 transitions, 160 flow [2021-10-03 12:09:45,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 160 flow [2021-10-03 12:09:45,770 INFO L129 PetriNetUnfolder]: 6/70 cut-off events. [2021-10-03 12:09:45,771 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-03 12:09:45,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 70 events. 6/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2021-10-03 12:09:45,779 INFO L116 LiptonReduction]: Number of co-enabled transitions 432 [2021-10-03 12:09:47,943 INFO L131 LiptonReduction]: Checked pairs total: 436 [2021-10-03 12:09:47,945 INFO L133 LiptonReduction]: Total number of compositions: 61 [2021-10-03 12:09:47,959 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-10-03 12:09:47,982 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 12:09:47,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:47,996 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:47,996 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:48,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1306465042, now seen corresponding path program 1 times [2021-10-03 12:09:48,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:48,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768251614] [2021-10-03 12:09:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:48,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:48,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:48,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768251614] [2021-10-03 12:09:48,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768251614] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:09:48,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:09:48,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 12:09:48,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59210841] [2021-10-03 12:09:48,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 12:09:48,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:48,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 12:09:48,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:09:48,664 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:48,738 INFO L93 Difference]: Finished difference Result 71 states and 150 transitions. [2021-10-03 12:09:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:09:48,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 12:09:48,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:48,752 INFO L225 Difference]: With dead ends: 71 [2021-10-03 12:09:48,753 INFO L226 Difference]: Without dead ends: 66 [2021-10-03 12:09:48,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:09:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-03 12:09:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-10-03 12:09:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:48,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2021-10-03 12:09:48,798 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 13 [2021-10-03 12:09:48,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:48,799 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2021-10-03 12:09:48,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:48,799 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2021-10-03 12:09:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 12:09:48,801 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:48,801 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:48,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-03 12:09:48,802 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:48,803 INFO L82 PathProgramCache]: Analyzing trace with hash -835073200, now seen corresponding path program 2 times [2021-10-03 12:09:48,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:48,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681614339] [2021-10-03 12:09:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:48,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:49,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:49,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681614339] [2021-10-03 12:09:49,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681614339] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:09:49,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:09:49,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 12:09:49,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816690079] [2021-10-03 12:09:49,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 12:09:49,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 12:09:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:09:49,175 INFO L87 Difference]: Start difference. First operand 48 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:49,342 INFO L93 Difference]: Finished difference Result 81 states and 166 transitions. [2021-10-03 12:09:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:09:49,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 12:09:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:49,347 INFO L225 Difference]: With dead ends: 81 [2021-10-03 12:09:49,349 INFO L226 Difference]: Without dead ends: 76 [2021-10-03 12:09:49,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-03 12:09:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-03 12:09:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2021-10-03 12:09:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2021-10-03 12:09:49,373 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 13 [2021-10-03 12:09:49,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:49,379 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2021-10-03 12:09:49,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2021-10-03 12:09:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 12:09:49,381 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:49,381 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:49,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-03 12:09:49,381 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:49,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash -779661940, now seen corresponding path program 3 times [2021-10-03 12:09:49,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:49,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916760822] [2021-10-03 12:09:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:49,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:49,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:49,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916760822] [2021-10-03 12:09:49,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916760822] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:09:49,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:09:49,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 12:09:49,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421366410] [2021-10-03 12:09:49,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 12:09:49,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:49,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 12:09:49,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:09:49,677 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:49,751 INFO L93 Difference]: Finished difference Result 75 states and 159 transitions. [2021-10-03 12:09:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:09:49,752 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 12:09:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:49,753 INFO L225 Difference]: With dead ends: 75 [2021-10-03 12:09:49,753 INFO L226 Difference]: Without dead ends: 70 [2021-10-03 12:09:49,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:09:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-03 12:09:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2021-10-03 12:09:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2021-10-03 12:09:49,763 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 13 [2021-10-03 12:09:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:49,764 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2021-10-03 12:09:49,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2021-10-03 12:09:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 12:09:49,766 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:49,766 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:49,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-03 12:09:49,766 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:49,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1857733226, now seen corresponding path program 4 times [2021-10-03 12:09:49,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:49,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450292531] [2021-10-03 12:09:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:49,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:50,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:50,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450292531] [2021-10-03 12:09:50,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450292531] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:09:50,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:09:50,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 12:09:50,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116200483] [2021-10-03 12:09:50,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 12:09:50,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:50,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 12:09:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:09:50,053 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:50,194 INFO L93 Difference]: Finished difference Result 97 states and 198 transitions. [2021-10-03 12:09:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:09:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 12:09:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:50,196 INFO L225 Difference]: With dead ends: 97 [2021-10-03 12:09:50,196 INFO L226 Difference]: Without dead ends: 92 [2021-10-03 12:09:50,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-03 12:09:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-03 12:09:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2021-10-03 12:09:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 55 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) [2021-10-03 12:09:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2021-10-03 12:09:50,206 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 13 [2021-10-03 12:09:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:50,207 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2021-10-03 12:09:50,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2021-10-03 12:09:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 12:09:50,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:50,209 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:50,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-03 12:09:50,209 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1802321966, now seen corresponding path program 5 times [2021-10-03 12:09:50,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:50,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732474651] [2021-10-03 12:09:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:50,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:50,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:50,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732474651] [2021-10-03 12:09:50,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732474651] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:09:50,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:09:50,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 12:09:50,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125300887] [2021-10-03 12:09:50,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 12:09:50,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:50,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 12:09:50,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:09:50,455 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:50,514 INFO L93 Difference]: Finished difference Result 91 states and 191 transitions. [2021-10-03 12:09:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:09:50,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 12:09:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:50,517 INFO L225 Difference]: With dead ends: 91 [2021-10-03 12:09:50,517 INFO L226 Difference]: Without dead ends: 86 [2021-10-03 12:09:50,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:09:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-03 12:09:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2021-10-03 12:09:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 121 transitions. [2021-10-03 12:09:50,526 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 121 transitions. Word has length 13 [2021-10-03 12:09:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:50,526 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 121 transitions. [2021-10-03 12:09:50,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 121 transitions. [2021-10-03 12:09:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 12:09:50,528 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:50,528 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:50,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-03 12:09:50,529 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:50,530 INFO L82 PathProgramCache]: Analyzing trace with hash -145930626, now seen corresponding path program 6 times [2021-10-03 12:09:50,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:50,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917735279] [2021-10-03 12:09:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:50,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:50,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:50,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917735279] [2021-10-03 12:09:50,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917735279] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:09:50,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:09:50,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 12:09:50,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267147962] [2021-10-03 12:09:50,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 12:09:50,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 12:09:50,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:09:50,729 INFO L87 Difference]: Start difference. First operand 54 states and 121 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:50,877 INFO L93 Difference]: Finished difference Result 77 states and 163 transitions. [2021-10-03 12:09:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:09:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 12:09:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:50,879 INFO L225 Difference]: With dead ends: 77 [2021-10-03 12:09:50,879 INFO L226 Difference]: Without dead ends: 72 [2021-10-03 12:09:50,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:09:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-03 12:09:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-10-03 12:09:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 124 transitions. [2021-10-03 12:09:50,887 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 124 transitions. Word has length 13 [2021-10-03 12:09:50,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:50,888 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 124 transitions. [2021-10-03 12:09:50,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,888 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 124 transitions. [2021-10-03 12:09:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:09:50,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:50,889 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:50,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-03 12:09:50,890 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:50,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:50,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1846273340, now seen corresponding path program 1 times [2021-10-03 12:09:50,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:50,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245274305] [2021-10-03 12:09:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:50,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:50,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:50,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245274305] [2021-10-03 12:09:50,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245274305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:09:50,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:09:50,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-03 12:09:50,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505991364] [2021-10-03 12:09:50,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-03 12:09:50,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:50,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-03 12:09:50,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:09:50,943 INFO L87 Difference]: Start difference. First operand 56 states and 124 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:50,951 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2021-10-03 12:09:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-03 12:09:50,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 12:09:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:50,956 INFO L225 Difference]: With dead ends: 52 [2021-10-03 12:09:50,956 INFO L226 Difference]: Without dead ends: 42 [2021-10-03 12:09:50,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:09:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-03 12:09:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-03 12:09:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 88 transitions. [2021-10-03 12:09:50,965 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 88 transitions. Word has length 14 [2021-10-03 12:09:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:50,968 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 88 transitions. [2021-10-03 12:09:50,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 88 transitions. [2021-10-03 12:09:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:09:50,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:50,971 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:50,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-03 12:09:50,972 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:50,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:50,974 INFO L82 PathProgramCache]: Analyzing trace with hash -12282784, now seen corresponding path program 1 times [2021-10-03 12:09:50,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:50,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912840286] [2021-10-03 12:09:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:50,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:51,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:51,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912840286] [2021-10-03 12:09:51,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912840286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:51,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486847744] [2021-10-03 12:09:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:51,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:51,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:51,138 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) [2021-10-03 12:09:51,146 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 [2021-10-03 12:09:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:51,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:09:51,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:09:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:51,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486847744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:51,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:09:51,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-03 12:09:51,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884031002] [2021-10-03 12:09:51,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:09:51,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:09:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:09:51,633 INFO L87 Difference]: Start difference. First operand 42 states and 88 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:51,822 INFO L93 Difference]: Finished difference Result 99 states and 191 transitions. [2021-10-03 12:09:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:09:51,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 12:09:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:51,824 INFO L225 Difference]: With dead ends: 99 [2021-10-03 12:09:51,824 INFO L226 Difference]: Without dead ends: 94 [2021-10-03 12:09:51,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:09:51,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-03 12:09:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2021-10-03 12:09:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.253731343283582) internal successors, (151), 67 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 151 transitions. [2021-10-03 12:09:51,832 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 151 transitions. Word has length 14 [2021-10-03 12:09:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:51,833 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 151 transitions. [2021-10-03 12:09:51,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 151 transitions. [2021-10-03 12:09:51,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:09:51,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:51,835 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:51,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-03 12:09:52,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:52,051 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:52,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2141146270, now seen corresponding path program 2 times [2021-10-03 12:09:52,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:52,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989316955] [2021-10-03 12:09:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:52,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:52,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:52,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989316955] [2021-10-03 12:09:52,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989316955] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:52,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145982631] [2021-10-03 12:09:52,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:09:52,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:52,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:52,252 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) [2021-10-03 12:09:52,262 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 [2021-10-03 12:09:52,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:09:52,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:09:52,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:09:52,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:09:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:52,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145982631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:52,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:09:52,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-03 12:09:52,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143420793] [2021-10-03 12:09:52,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:09:52,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:09:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:09:52,636 INFO L87 Difference]: Start difference. First operand 68 states and 151 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:52,877 INFO L93 Difference]: Finished difference Result 129 states and 247 transitions. [2021-10-03 12:09:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-03 12:09:52,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 12:09:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:52,880 INFO L225 Difference]: With dead ends: 129 [2021-10-03 12:09:52,880 INFO L226 Difference]: Without dead ends: 124 [2021-10-03 12:09:52,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:09:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-03 12:09:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 72. [2021-10-03 12:09:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-03 12:09:52,897 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 14 [2021-10-03 12:09:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:52,898 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-03 12:09:52,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-03 12:09:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:09:52,905 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:52,905 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:52,948 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 [2021-10-03 12:09:53,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:53,120 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2098409766, now seen corresponding path program 3 times [2021-10-03 12:09:53,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:53,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486689335] [2021-10-03 12:09:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:53,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:53,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:53,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486689335] [2021-10-03 12:09:53,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486689335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:53,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637577598] [2021-10-03 12:09:53,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:09:53,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:53,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:53,288 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) [2021-10-03 12:09:53,297 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 [2021-10-03 12:09:53,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:09:53,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:09:53,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:09:53,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:09:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:53,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637577598] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:53,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:09:53,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-03 12:09:53,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405923406] [2021-10-03 12:09:53,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:09:53,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:53,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:09:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:09:53,693 INFO L87 Difference]: Start difference. First operand 72 states and 165 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:53,962 INFO L93 Difference]: Finished difference Result 123 states and 240 transitions. [2021-10-03 12:09:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-03 12:09:53,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 12:09:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:53,965 INFO L225 Difference]: With dead ends: 123 [2021-10-03 12:09:53,965 INFO L226 Difference]: Without dead ends: 118 [2021-10-03 12:09:53,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:09:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-03 12:09:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 72. [2021-10-03 12:09:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-03 12:09:53,975 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 14 [2021-10-03 12:09:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:53,975 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-03 12:09:53,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-03 12:09:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:09:53,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:53,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:54,026 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 [2021-10-03 12:09:54,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:54,192 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash 484293112, now seen corresponding path program 4 times [2021-10-03 12:09:54,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:54,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276484266] [2021-10-03 12:09:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:54,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:54,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:54,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276484266] [2021-10-03 12:09:54,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276484266] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:54,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582474726] [2021-10-03 12:09:54,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:09:54,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:54,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:54,325 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) [2021-10-03 12:09:54,346 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 [2021-10-03 12:09:54,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:09:54,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:09:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:09:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:09:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:54,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582474726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:54,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:09:54,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-03 12:09:54,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927917230] [2021-10-03 12:09:54,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:09:54,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:54,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:09:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:09:54,738 INFO L87 Difference]: Start difference. First operand 72 states and 165 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:54,844 INFO L93 Difference]: Finished difference Result 83 states and 180 transitions. [2021-10-03 12:09:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 12:09:54,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 12:09:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:54,847 INFO L225 Difference]: With dead ends: 83 [2021-10-03 12:09:54,847 INFO L226 Difference]: Without dead ends: 78 [2021-10-03 12:09:54,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-03 12:09:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-03 12:09:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2021-10-03 12:09:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 73 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 168 transitions. [2021-10-03 12:09:54,853 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 168 transitions. Word has length 14 [2021-10-03 12:09:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:54,854 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 168 transitions. [2021-10-03 12:09:54,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 168 transitions. [2021-10-03 12:09:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:09:54,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:54,855 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:54,896 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 [2021-10-03 12:09:55,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-03 12:09:55,061 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1153396622, now seen corresponding path program 5 times [2021-10-03 12:09:55,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:55,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412723833] [2021-10-03 12:09:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:55,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:55,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:55,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412723833] [2021-10-03 12:09:55,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412723833] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:55,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054903488] [2021-10-03 12:09:55,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:09:55,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:55,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:55,193 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) [2021-10-03 12:09:55,212 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 [2021-10-03 12:09:55,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:09:55,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:09:55,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:09:55,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:09:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:55,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054903488] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:55,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:09:55,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-03 12:09:55,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855371727] [2021-10-03 12:09:55,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:09:55,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:09:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:09:55,602 INFO L87 Difference]: Start difference. First operand 74 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:55,738 INFO L93 Difference]: Finished difference Result 85 states and 183 transitions. [2021-10-03 12:09:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 12:09:55,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 12:09:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:55,740 INFO L225 Difference]: With dead ends: 85 [2021-10-03 12:09:55,740 INFO L226 Difference]: Without dead ends: 80 [2021-10-03 12:09:55,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:09:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-03 12:09:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-10-03 12:09:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 73 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 168 transitions. [2021-10-03 12:09:55,746 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 168 transitions. Word has length 14 [2021-10-03 12:09:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:55,747 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 168 transitions. [2021-10-03 12:09:55,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 168 transitions. [2021-10-03 12:09:55,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:09:55,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:55,748 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:55,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-03 12:09:55,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:55,962 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:55,963 INFO L82 PathProgramCache]: Analyzing trace with hash 561973854, now seen corresponding path program 6 times [2021-10-03 12:09:55,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:55,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344540871] [2021-10-03 12:09:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:55,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:56,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:56,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344540871] [2021-10-03 12:09:56,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344540871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:56,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075789182] [2021-10-03 12:09:56,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:09:56,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:56,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:56,110 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) [2021-10-03 12:09:56,129 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 [2021-10-03 12:09:56,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 12:09:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:09:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:09:56,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:09:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:56,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075789182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:56,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:09:56,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-03 12:09:56,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656817555] [2021-10-03 12:09:56,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:09:56,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:56,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:09:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:09:56,542 INFO L87 Difference]: Start difference. First operand 74 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:56,822 INFO L93 Difference]: Finished difference Result 115 states and 225 transitions. [2021-10-03 12:09:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:09:56,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 12:09:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:56,824 INFO L225 Difference]: With dead ends: 115 [2021-10-03 12:09:56,825 INFO L226 Difference]: Without dead ends: 110 [2021-10-03 12:09:56,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:09:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-03 12:09:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 74. [2021-10-03 12:09:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 73 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 168 transitions. [2021-10-03 12:09:56,830 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 168 transitions. Word has length 14 [2021-10-03 12:09:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:56,831 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 168 transitions. [2021-10-03 12:09:56,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:56,831 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 168 transitions. [2021-10-03 12:09:56,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:09:56,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:56,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:56,868 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 [2021-10-03 12:09:57,045 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,SelfDestructingSolverStorable12 [2021-10-03 12:09:57,046 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash 617385114, now seen corresponding path program 7 times [2021-10-03 12:09:57,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:57,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903658127] [2021-10-03 12:09:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:57,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:57,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:57,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903658127] [2021-10-03 12:09:57,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903658127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:57,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134347625] [2021-10-03 12:09:57,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:09:57,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:57,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:57,180 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) [2021-10-03 12:09:57,205 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 [2021-10-03 12:09:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:57,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:09:57,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:09:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:57,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134347625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:57,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:09:57,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-03 12:09:57,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798840054] [2021-10-03 12:09:57,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:09:57,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:57,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:09:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:09:57,638 INFO L87 Difference]: Start difference. First operand 74 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:57,860 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-10-03 12:09:57,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 12:09:57,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 12:09:57,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:57,862 INFO L225 Difference]: With dead ends: 107 [2021-10-03 12:09:57,863 INFO L226 Difference]: Without dead ends: 102 [2021-10-03 12:09:57,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:09:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-03 12:09:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2021-10-03 12:09:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.2) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2021-10-03 12:09:57,868 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 14 [2021-10-03 12:09:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:57,868 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2021-10-03 12:09:57,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2021-10-03 12:09:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:09:57,869 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:57,870 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:57,913 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 [2021-10-03 12:09:58,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-03 12:09:58,082 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:58,083 INFO L82 PathProgramCache]: Analyzing trace with hash 372876426, now seen corresponding path program 8 times [2021-10-03 12:09:58,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:58,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985099221] [2021-10-03 12:09:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:58,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:58,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:58,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985099221] [2021-10-03 12:09:58,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985099221] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:58,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119925808] [2021-10-03 12:09:58,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:09:58,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:58,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:58,187 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) [2021-10-03 12:09:58,189 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 [2021-10-03 12:09:58,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:09:58,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:09:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:09:58,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:09:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:58,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119925808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:58,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:09:58,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-03 12:09:58,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978821475] [2021-10-03 12:09:58,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:09:58,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:09:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:09:58,620 INFO L87 Difference]: Start difference. First operand 66 states and 143 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:58,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:58,743 INFO L93 Difference]: Finished difference Result 75 states and 155 transitions. [2021-10-03 12:09:58,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 12:09:58,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 12:09:58,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:58,745 INFO L225 Difference]: With dead ends: 75 [2021-10-03 12:09:58,745 INFO L226 Difference]: Without dead ends: 70 [2021-10-03 12:09:58,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:09:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-03 12:09:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-10-03 12:09:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.2) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2021-10-03 12:09:58,750 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 14 [2021-10-03 12:09:58,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:58,751 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2021-10-03 12:09:58,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:09:58,751 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2021-10-03 12:09:58,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:09:58,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:58,752 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:58,793 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 [2021-10-03 12:09:58,953 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,SelfDestructingSolverStorable14 [2021-10-03 12:09:58,954 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:58,954 INFO L82 PathProgramCache]: Analyzing trace with hash -380203602, now seen corresponding path program 1 times [2021-10-03 12:09:58,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:58,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931490091] [2021-10-03 12:09:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:58,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:59,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:59,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931490091] [2021-10-03 12:09:59,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931490091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:59,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399892579] [2021-10-03 12:09:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:59,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:59,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:59,064 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) [2021-10-03 12:09:59,089 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 [2021-10-03 12:09:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:59,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:09:59,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:09:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:59,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399892579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:59,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:09:59,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 12:09:59,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205153921] [2021-10-03 12:09:59,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:09:59,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:09:59,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:09:59,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:09:59,450 INFO L87 Difference]: Start difference. First operand 66 states and 143 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-03 12:09:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:09:59,571 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-10-03 12:09:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:09:59,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 15 [2021-10-03 12:09:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:09:59,573 INFO L225 Difference]: With dead ends: 87 [2021-10-03 12:09:59,573 INFO L226 Difference]: Without dead ends: 68 [2021-10-03 12:09:59,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-03 12:09:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-03 12:09:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-10-03 12:09:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 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) [2021-10-03 12:09:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 130 transitions. [2021-10-03 12:09:59,576 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 130 transitions. Word has length 15 [2021-10-03 12:09:59,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:09:59,576 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 130 transitions. [2021-10-03 12:09:59,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-03 12:09:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 130 transitions. [2021-10-03 12:09:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:09:59,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:09:59,577 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:09:59,611 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 [2021-10-03 12:09:59,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:59,778 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:09:59,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:09:59,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2056207570, now seen corresponding path program 9 times [2021-10-03 12:09:59,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:09:59,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266149657] [2021-10-03 12:09:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:09:59,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:09:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:09:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:09:59,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:09:59,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266149657] [2021-10-03 12:09:59,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266149657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:09:59,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179989192] [2021-10-03 12:09:59,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:09:59,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:09:59,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:09:59,903 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) [2021-10-03 12:09:59,914 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 [2021-10-03 12:10:00,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:10:00,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:00,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:00,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:00,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179989192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:00,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:00,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:00,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647736223] [2021-10-03 12:10:00,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:00,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:00,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:00,386 INFO L87 Difference]: Start difference. First operand 60 states and 130 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:00,749 INFO L93 Difference]: Finished difference Result 124 states and 252 transitions. [2021-10-03 12:10:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 12:10:00,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:00,751 INFO L225 Difference]: With dead ends: 124 [2021-10-03 12:10:00,754 INFO L226 Difference]: Without dead ends: 114 [2021-10-03 12:10:00,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:10:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-03 12:10:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 64. [2021-10-03 12:10:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 63 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 137 transitions. [2021-10-03 12:10:00,762 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 137 transitions. Word has length 15 [2021-10-03 12:10:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:00,763 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 137 transitions. [2021-10-03 12:10:00,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:00,763 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 137 transitions. [2021-10-03 12:10:00,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:00,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:00,765 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:00,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-03 12:10:00,978 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,SelfDestructingSolverStorable16 [2021-10-03 12:10:00,978 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:00,980 INFO L82 PathProgramCache]: Analyzing trace with hash -85330672, now seen corresponding path program 10 times [2021-10-03 12:10:00,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:00,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620029715] [2021-10-03 12:10:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:00,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:01,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:01,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620029715] [2021-10-03 12:10:01,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620029715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:01,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834278733] [2021-10-03 12:10:01,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:10:01,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:01,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:01,156 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) [2021-10-03 12:10:01,171 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 [2021-10-03 12:10:01,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:10:01,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:01,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:01,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:01,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834278733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:01,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:01,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:01,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30390609] [2021-10-03 12:10:01,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:01,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:01,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:01,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:01,642 INFO L87 Difference]: Start difference. First operand 64 states and 137 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:02,282 INFO L93 Difference]: Finished difference Result 171 states and 340 transitions. [2021-10-03 12:10:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-03 12:10:02,282 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:02,285 INFO L225 Difference]: With dead ends: 171 [2021-10-03 12:10:02,285 INFO L226 Difference]: Without dead ends: 156 [2021-10-03 12:10:02,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-10-03 12:10:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-03 12:10:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 72. [2021-10-03 12:10:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 168 transitions. [2021-10-03 12:10:02,291 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 168 transitions. Word has length 15 [2021-10-03 12:10:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:02,291 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 168 transitions. [2021-10-03 12:10:02,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 168 transitions. [2021-10-03 12:10:02,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:02,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:02,293 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:02,335 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 [2021-10-03 12:10:02,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-03 12:10:02,507 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:02,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash -29919412, now seen corresponding path program 11 times [2021-10-03 12:10:02,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:02,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888761234] [2021-10-03 12:10:02,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:02,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:02,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:02,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888761234] [2021-10-03 12:10:02,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888761234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:02,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224467889] [2021-10-03 12:10:02,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:10:02,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:02,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:02,666 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) [2021-10-03 12:10:02,673 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 [2021-10-03 12:10:02,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:02,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:03,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224467889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:03,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:03,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:03,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061496806] [2021-10-03 12:10:03,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:03,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:03,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:03,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:03,243 INFO L87 Difference]: Start difference. First operand 72 states and 168 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:03,785 INFO L93 Difference]: Finished difference Result 164 states and 332 transitions. [2021-10-03 12:10:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:10:03,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:03,787 INFO L225 Difference]: With dead ends: 164 [2021-10-03 12:10:03,787 INFO L226 Difference]: Without dead ends: 154 [2021-10-03 12:10:03,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 560.6ms TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:10:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-03 12:10:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 72. [2021-10-03 12:10:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 168 transitions. [2021-10-03 12:10:03,792 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 168 transitions. Word has length 15 [2021-10-03 12:10:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:03,792 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 168 transitions. [2021-10-03 12:10:03,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 168 transitions. [2021-10-03 12:10:03,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:03,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:03,794 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:03,830 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 [2021-10-03 12:10:03,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:03,995 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:03,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1742183830, now seen corresponding path program 12 times [2021-10-03 12:10:03,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:03,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624116872] [2021-10-03 12:10:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:03,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:04,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:04,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624116872] [2021-10-03 12:10:04,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624116872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:04,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688743035] [2021-10-03 12:10:04,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:10:04,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:04,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:04,122 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) [2021-10-03 12:10:04,126 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 [2021-10-03 12:10:04,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 12:10:04,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:04,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:04,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:04,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688743035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:04,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:04,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:04,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149425830] [2021-10-03 12:10:04,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:04,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:04,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:04,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:04,692 INFO L87 Difference]: Start difference. First operand 72 states and 168 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:05,122 INFO L93 Difference]: Finished difference Result 156 states and 319 transitions. [2021-10-03 12:10:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-03 12:10:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:05,124 INFO L225 Difference]: With dead ends: 156 [2021-10-03 12:10:05,125 INFO L226 Difference]: Without dead ends: 130 [2021-10-03 12:10:05,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:10:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-03 12:10:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 74. [2021-10-03 12:10:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2739726027397262) internal successors, (166), 73 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 166 transitions. [2021-10-03 12:10:05,131 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 166 transitions. Word has length 15 [2021-10-03 12:10:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:05,131 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 166 transitions. [2021-10-03 12:10:05,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 166 transitions. [2021-10-03 12:10:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:05,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:05,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:05,166 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 [2021-10-03 12:10:05,346 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,SelfDestructingSolverStorable19 [2021-10-03 12:10:05,347 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:05,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1471992914, now seen corresponding path program 2 times [2021-10-03 12:10:05,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:05,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302992516] [2021-10-03 12:10:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:05,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:05,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:05,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302992516] [2021-10-03 12:10:05,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302992516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:05,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081393651] [2021-10-03 12:10:05,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:10:05,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:05,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:05,465 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) [2021-10-03 12:10:05,479 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 [2021-10-03 12:10:05,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:10:05,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:05,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081393651] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:05,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:05,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 12:10:05,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032227952] [2021-10-03 12:10:05,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:10:05,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:05,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:10:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:10:05,942 INFO L87 Difference]: Start difference. First operand 74 states and 166 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-03 12:10:06,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:06,045 INFO L93 Difference]: Finished difference Result 97 states and 201 transitions. [2021-10-03 12:10:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:10:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 15 [2021-10-03 12:10:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:06,047 INFO L225 Difference]: With dead ends: 97 [2021-10-03 12:10:06,047 INFO L226 Difference]: Without dead ends: 84 [2021-10-03 12:10:06,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-03 12:10:06,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-10-03 12:10:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.28) internal successors, (171), 75 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 171 transitions. [2021-10-03 12:10:06,052 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 171 transitions. Word has length 15 [2021-10-03 12:10:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:06,052 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 171 transitions. [2021-10-03 12:10:06,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-03 12:10:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 171 transitions. [2021-10-03 12:10:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:06,054 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:06,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:06,088 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 [2021-10-03 12:10:06,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:06,268 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash 718139218, now seen corresponding path program 3 times [2021-10-03 12:10:06,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:06,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433576942] [2021-10-03 12:10:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:06,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:06,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:06,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433576942] [2021-10-03 12:10:06,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433576942] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:06,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568729588] [2021-10-03 12:10:06,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:10:06,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:06,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:06,397 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) [2021-10-03 12:10:06,400 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 [2021-10-03 12:10:06,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:10:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:10:06,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:06,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568729588] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:06,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:06,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 12:10:06,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117117794] [2021-10-03 12:10:06,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:10:06,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:06,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:10:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:10:06,921 INFO L87 Difference]: Start difference. First operand 76 states and 171 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-03 12:10:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:07,057 INFO L93 Difference]: Finished difference Result 103 states and 209 transitions. [2021-10-03 12:10:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:10:07,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 15 [2021-10-03 12:10:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:07,059 INFO L225 Difference]: With dead ends: 103 [2021-10-03 12:10:07,059 INFO L226 Difference]: Without dead ends: 98 [2021-10-03 12:10:07,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-03 12:10:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2021-10-03 12:10:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.311688311688312) internal successors, (178), 77 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 178 transitions. [2021-10-03 12:10:07,064 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 178 transitions. Word has length 15 [2021-10-03 12:10:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:07,065 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 178 transitions. [2021-10-03 12:10:07,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-03 12:10:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 178 transitions. [2021-10-03 12:10:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:07,066 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:07,066 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:07,103 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 [2021-10-03 12:10:07,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:07,282 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:07,283 INFO L82 PathProgramCache]: Analyzing trace with hash 773550478, now seen corresponding path program 4 times [2021-10-03 12:10:07,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:07,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203143088] [2021-10-03 12:10:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:07,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:07,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:07,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203143088] [2021-10-03 12:10:07,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203143088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:07,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510654542] [2021-10-03 12:10:07,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:10:07,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:07,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:07,399 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) [2021-10-03 12:10:07,412 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 [2021-10-03 12:10:07,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:10:07,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:07,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:10:07,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:07,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510654542] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:07,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:07,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 12:10:07,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070605176] [2021-10-03 12:10:07,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:10:07,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:10:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:10:07,929 INFO L87 Difference]: Start difference. First operand 78 states and 178 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-03 12:10:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:08,034 INFO L93 Difference]: Finished difference Result 97 states and 202 transitions. [2021-10-03 12:10:08,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:10:08,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 15 [2021-10-03 12:10:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:08,036 INFO L225 Difference]: With dead ends: 97 [2021-10-03 12:10:08,036 INFO L226 Difference]: Without dead ends: 88 [2021-10-03 12:10:08,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-03 12:10:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-10-03 12:10:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 176 transitions. [2021-10-03 12:10:08,040 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 176 transitions. Word has length 15 [2021-10-03 12:10:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:08,040 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 176 transitions. [2021-10-03 12:10:08,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-03 12:10:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 176 transitions. [2021-10-03 12:10:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:08,041 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:08,041 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:08,070 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 [2021-10-03 12:10:08,254 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,SelfDestructingSolverStorable22 [2021-10-03 12:10:08,255 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:08,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:08,255 INFO L82 PathProgramCache]: Analyzing trace with hash -26813354, now seen corresponding path program 13 times [2021-10-03 12:10:08,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:08,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986522188] [2021-10-03 12:10:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:08,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:08,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:08,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986522188] [2021-10-03 12:10:08,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986522188] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:08,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579889429] [2021-10-03 12:10:08,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:10:08,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:08,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:08,392 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) [2021-10-03 12:10:08,398 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 [2021-10-03 12:10:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:08,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579889429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:08,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:08,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:08,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197236370] [2021-10-03 12:10:08,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:08,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:08,989 INFO L87 Difference]: Start difference. First operand 78 states and 176 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:09,504 INFO L93 Difference]: Finished difference Result 154 states and 302 transitions. [2021-10-03 12:10:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:10:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:09,506 INFO L225 Difference]: With dead ends: 154 [2021-10-03 12:10:09,507 INFO L226 Difference]: Without dead ends: 140 [2021-10-03 12:10:09,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:10:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-03 12:10:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 76. [2021-10-03 12:10:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.28) internal successors, (171), 75 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 171 transitions. [2021-10-03 12:10:09,512 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 171 transitions. Word has length 15 [2021-10-03 12:10:09,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:09,513 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 171 transitions. [2021-10-03 12:10:09,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 171 transitions. [2021-10-03 12:10:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:09,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:09,514 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:09,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-03 12:10:09,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:09,728 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash 28597906, now seen corresponding path program 14 times [2021-10-03 12:10:09,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:09,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307722287] [2021-10-03 12:10:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:09,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:09,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:09,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307722287] [2021-10-03 12:10:09,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307722287] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:09,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382481306] [2021-10-03 12:10:09,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:10:09,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:09,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:09,890 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) [2021-10-03 12:10:09,910 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 [2021-10-03 12:10:10,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:10,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:10,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:10,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:10,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382481306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:10,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:10,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:10,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560372661] [2021-10-03 12:10:10,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:10,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:10,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:10,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:10,537 INFO L87 Difference]: Start difference. First operand 76 states and 171 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:11,056 INFO L93 Difference]: Finished difference Result 138 states and 282 transitions. [2021-10-03 12:10:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-03 12:10:11,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:11,057 INFO L225 Difference]: With dead ends: 138 [2021-10-03 12:10:11,058 INFO L226 Difference]: Without dead ends: 128 [2021-10-03 12:10:11,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 511.8ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:10:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-03 12:10:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 74. [2021-10-03 12:10:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2465753424657535) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 164 transitions. [2021-10-03 12:10:11,062 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 164 transitions. Word has length 15 [2021-10-03 12:10:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:11,063 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 164 transitions. [2021-10-03 12:10:11,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 164 transitions. [2021-10-03 12:10:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:11,064 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:11,064 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:11,099 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 [2021-10-03 12:10:11,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:11,278 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:11,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:11,278 INFO L82 PathProgramCache]: Analyzing trace with hash 342043944, now seen corresponding path program 5 times [2021-10-03 12:10:11,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:11,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982182442] [2021-10-03 12:10:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:11,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:11,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:11,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982182442] [2021-10-03 12:10:11,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982182442] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:11,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806028007] [2021-10-03 12:10:11,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:10:11,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:11,388 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) [2021-10-03 12:10:11,394 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 [2021-10-03 12:10:11,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:11,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:11,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-03 12:10:11,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:12,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806028007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:12,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:12,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:12,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722726229] [2021-10-03 12:10:12,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:12,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:12,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:12,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:12,007 INFO L87 Difference]: Start difference. First operand 74 states and 164 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:12,186 INFO L93 Difference]: Finished difference Result 101 states and 206 transitions. [2021-10-03 12:10:12,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:10:12,187 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:12,188 INFO L225 Difference]: With dead ends: 101 [2021-10-03 12:10:12,188 INFO L226 Difference]: Without dead ends: 88 [2021-10-03 12:10:12,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:10:12,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-03 12:10:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2021-10-03 12:10:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 162 transitions. [2021-10-03 12:10:12,193 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 162 transitions. Word has length 15 [2021-10-03 12:10:12,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:12,193 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 162 transitions. [2021-10-03 12:10:12,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 162 transitions. [2021-10-03 12:10:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:12,194 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:12,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:12,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-03 12:10:12,407 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,SelfDestructingSolverStorable25 [2021-10-03 12:10:12,408 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:12,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1762791220, now seen corresponding path program 6 times [2021-10-03 12:10:12,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:12,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488686353] [2021-10-03 12:10:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:12,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:12,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:12,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488686353] [2021-10-03 12:10:12,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488686353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:12,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779304286] [2021-10-03 12:10:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:10:12,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:12,557 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) [2021-10-03 12:10:12,582 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 [2021-10-03 12:10:12,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:10:12,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:12,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:10:12,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:13,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779304286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:13,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:13,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-03 12:10:13,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013085488] [2021-10-03 12:10:13,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 12:10:13,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 12:10:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-03 12:10:13,109 INFO L87 Difference]: Start difference. First operand 74 states and 162 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 12:10:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:13,222 INFO L93 Difference]: Finished difference Result 93 states and 190 transitions. [2021-10-03 12:10:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:10:13,222 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-03 12:10:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:13,224 INFO L225 Difference]: With dead ends: 93 [2021-10-03 12:10:13,224 INFO L226 Difference]: Without dead ends: 88 [2021-10-03 12:10:13,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-03 12:10:13,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2021-10-03 12:10:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2533333333333334) internal successors, (169), 75 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:13,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 169 transitions. [2021-10-03 12:10:13,228 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 169 transitions. Word has length 15 [2021-10-03 12:10:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:13,230 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 169 transitions. [2021-10-03 12:10:13,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 12:10:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 169 transitions. [2021-10-03 12:10:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:13,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:13,240 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:13,272 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 [2021-10-03 12:10:13,454 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,SelfDestructingSolverStorable26 [2021-10-03 12:10:13,455 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:13,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1707379960, now seen corresponding path program 7 times [2021-10-03 12:10:13,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:13,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513138208] [2021-10-03 12:10:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:13,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:13,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:13,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513138208] [2021-10-03 12:10:13,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513138208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:13,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882552952] [2021-10-03 12:10:13,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:10:13,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:13,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:13,596 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) [2021-10-03 12:10:13,615 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 [2021-10-03 12:10:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:13,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:10:13,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:14,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882552952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:14,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:14,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-03 12:10:14,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75885497] [2021-10-03 12:10:14,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 12:10:14,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:14,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 12:10:14,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-03 12:10:14,125 INFO L87 Difference]: Start difference. First operand 76 states and 169 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 12:10:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:14,233 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2021-10-03 12:10:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:10:14,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-03 12:10:14,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:14,235 INFO L225 Difference]: With dead ends: 87 [2021-10-03 12:10:14,235 INFO L226 Difference]: Without dead ends: 78 [2021-10-03 12:10:14,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-03 12:10:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-10-03 12:10:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.211267605633803) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 157 transitions. [2021-10-03 12:10:14,239 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 157 transitions. Word has length 15 [2021-10-03 12:10:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:14,239 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 157 transitions. [2021-10-03 12:10:14,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 12:10:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 157 transitions. [2021-10-03 12:10:14,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:14,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:14,240 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:14,265 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 [2021-10-03 12:10:14,445 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,SelfDestructingSolverStorable27 [2021-10-03 12:10:14,446 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:14,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:14,447 INFO L82 PathProgramCache]: Analyzing trace with hash -793798378, now seen corresponding path program 15 times [2021-10-03 12:10:14,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:14,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986972400] [2021-10-03 12:10:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:14,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:14,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:14,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986972400] [2021-10-03 12:10:14,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986972400] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:14,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12052611] [2021-10-03 12:10:14,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:10:14,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:14,579 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) [2021-10-03 12:10:14,605 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 [2021-10-03 12:10:14,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:10:14,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:14,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:14,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:15,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12052611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:15,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:15,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:15,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888897370] [2021-10-03 12:10:15,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:15,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:15,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:15,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:15,288 INFO L87 Difference]: Start difference. First operand 72 states and 157 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:15,526 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-10-03 12:10:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-03 12:10:15,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:15,531 INFO L225 Difference]: With dead ends: 90 [2021-10-03 12:10:15,531 INFO L226 Difference]: Without dead ends: 72 [2021-10-03 12:10:15,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:10:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-03 12:10:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-03 12:10:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2021-10-03 12:10:15,538 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 15 [2021-10-03 12:10:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:15,539 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2021-10-03 12:10:15,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2021-10-03 12:10:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:15,540 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:15,540 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:15,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-03 12:10:15,752 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,SelfDestructingSolverStorable28 [2021-10-03 12:10:15,753 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:15,754 INFO L82 PathProgramCache]: Analyzing trace with hash 843078826, now seen corresponding path program 16 times [2021-10-03 12:10:15,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:15,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287713925] [2021-10-03 12:10:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:15,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:15,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:15,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287713925] [2021-10-03 12:10:15,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287713925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:15,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907423597] [2021-10-03 12:10:15,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:10:15,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:15,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:15,854 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) [2021-10-03 12:10:15,855 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 [2021-10-03 12:10:16,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:10:16,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:16,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:16,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907423597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:16,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:16,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:16,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175394769] [2021-10-03 12:10:16,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:16,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:16,542 INFO L87 Difference]: Start difference. First operand 72 states and 155 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:16,883 INFO L93 Difference]: Finished difference Result 120 states and 229 transitions. [2021-10-03 12:10:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 12:10:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:16,885 INFO L225 Difference]: With dead ends: 120 [2021-10-03 12:10:16,885 INFO L226 Difference]: Without dead ends: 104 [2021-10-03 12:10:16,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:10:16,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-03 12:10:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 76. [2021-10-03 12:10:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-10-03 12:10:16,894 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 15 [2021-10-03 12:10:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:16,894 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-10-03 12:10:16,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-10-03 12:10:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:16,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:16,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:16,921 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 [2021-10-03 12:10:17,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:17,101 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:17,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1113269742, now seen corresponding path program 8 times [2021-10-03 12:10:17,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:17,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262621282] [2021-10-03 12:10:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:17,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:17,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:17,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262621282] [2021-10-03 12:10:17,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262621282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:17,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300063362] [2021-10-03 12:10:17,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:10:17,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:17,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:17,214 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) [2021-10-03 12:10:17,228 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 [2021-10-03 12:10:17,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:17,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:17,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:10:17,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:17,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300063362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:17,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:17,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-03 12:10:17,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646192655] [2021-10-03 12:10:17,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 12:10:17,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:17,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 12:10:17,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-03 12:10:17,805 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 12:10:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:17,901 INFO L93 Difference]: Finished difference Result 95 states and 189 transitions. [2021-10-03 12:10:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:10:17,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-03 12:10:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:17,913 INFO L225 Difference]: With dead ends: 95 [2021-10-03 12:10:17,913 INFO L226 Difference]: Without dead ends: 82 [2021-10-03 12:10:17,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-03 12:10:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-10-03 12:10:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1971830985915495) internal successors, (156), 71 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 156 transitions. [2021-10-03 12:10:17,918 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 156 transitions. Word has length 15 [2021-10-03 12:10:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:17,919 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 156 transitions. [2021-10-03 12:10:17,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 12:10:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 156 transitions. [2021-10-03 12:10:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:17,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:17,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:17,954 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 [2021-10-03 12:10:18,133 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,SelfDestructingSolverStorable30 [2021-10-03 12:10:18,134 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:18,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:18,135 INFO L82 PathProgramCache]: Analyzing trace with hash -991565422, now seen corresponding path program 9 times [2021-10-03 12:10:18,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:18,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991698600] [2021-10-03 12:10:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:18,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:18,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:18,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991698600] [2021-10-03 12:10:18,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991698600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:18,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166014112] [2021-10-03 12:10:18,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:10:18,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:18,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:18,255 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) [2021-10-03 12:10:18,268 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 [2021-10-03 12:10:18,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:10:18,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:18,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:10:18,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:18,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166014112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:18,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:18,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-03 12:10:18,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731369541] [2021-10-03 12:10:18,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 12:10:18,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:18,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 12:10:18,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-03 12:10:18,873 INFO L87 Difference]: Start difference. First operand 72 states and 156 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 12:10:19,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:19,001 INFO L93 Difference]: Finished difference Result 87 states and 173 transitions. [2021-10-03 12:10:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:10:19,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-03 12:10:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:19,003 INFO L225 Difference]: With dead ends: 87 [2021-10-03 12:10:19,003 INFO L226 Difference]: Without dead ends: 82 [2021-10-03 12:10:19,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-03 12:10:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-10-03 12:10:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1971830985915495) internal successors, (156), 71 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 156 transitions. [2021-10-03 12:10:19,008 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 156 transitions. Word has length 15 [2021-10-03 12:10:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:19,009 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 156 transitions. [2021-10-03 12:10:19,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 12:10:19,009 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 156 transitions. [2021-10-03 12:10:19,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:19,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:19,011 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:19,050 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 [2021-10-03 12:10:19,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:19,225 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:19,226 INFO L82 PathProgramCache]: Analyzing trace with hash -936154162, now seen corresponding path program 10 times [2021-10-03 12:10:19,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:19,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284608339] [2021-10-03 12:10:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:19,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:19,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:19,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284608339] [2021-10-03 12:10:19,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284608339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:19,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677077100] [2021-10-03 12:10:19,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:10:19,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:19,346 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) [2021-10-03 12:10:19,360 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 [2021-10-03 12:10:19,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:10:19,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:19,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-03 12:10:19,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:19,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677077100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:19,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:19,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-03 12:10:19,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285814742] [2021-10-03 12:10:19,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 12:10:19,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 12:10:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-03 12:10:19,968 INFO L87 Difference]: Start difference. First operand 72 states and 156 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 12:10:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:20,073 INFO L93 Difference]: Finished difference Result 81 states and 166 transitions. [2021-10-03 12:10:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 12:10:20,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-03 12:10:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:20,075 INFO L225 Difference]: With dead ends: 81 [2021-10-03 12:10:20,075 INFO L226 Difference]: Without dead ends: 72 [2021-10-03 12:10:20,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-03 12:10:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2021-10-03 12:10:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1846153846153844) internal successors, (142), 65 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 142 transitions. [2021-10-03 12:10:20,082 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 142 transitions. Word has length 15 [2021-10-03 12:10:20,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:20,082 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 142 transitions. [2021-10-03 12:10:20,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 12:10:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 142 transitions. [2021-10-03 12:10:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:20,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:20,083 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:20,127 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 [2021-10-03 12:10:20,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:20,294 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:20,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1736517994, now seen corresponding path program 17 times [2021-10-03 12:10:20,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:20,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953684310] [2021-10-03 12:10:20,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:20,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:20,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:20,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953684310] [2021-10-03 12:10:20,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953684310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:20,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016516853] [2021-10-03 12:10:20,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:10:20,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:20,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:20,415 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) [2021-10-03 12:10:20,416 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 [2021-10-03 12:10:20,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:20,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:20,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:21,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016516853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:21,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:21,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:21,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117030717] [2021-10-03 12:10:21,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:21,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:21,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:21,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:21,201 INFO L87 Difference]: Start difference. First operand 66 states and 142 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:21,559 INFO L93 Difference]: Finished difference Result 122 states and 225 transitions. [2021-10-03 12:10:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-03 12:10:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:21,561 INFO L225 Difference]: With dead ends: 122 [2021-10-03 12:10:21,561 INFO L226 Difference]: Without dead ends: 108 [2021-10-03 12:10:21,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:10:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-03 12:10:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 64. [2021-10-03 12:10:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 63 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 137 transitions. [2021-10-03 12:10:21,565 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 137 transitions. Word has length 15 [2021-10-03 12:10:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:21,566 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 137 transitions. [2021-10-03 12:10:21,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:21,566 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 137 transitions. [2021-10-03 12:10:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:21,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:21,567 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:21,604 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 [2021-10-03 12:10:21,767 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,SelfDestructingSolverStorable33 [2021-10-03 12:10:21,768 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1681106734, now seen corresponding path program 18 times [2021-10-03 12:10:21,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:21,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141493071] [2021-10-03 12:10:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:21,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:21,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:21,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141493071] [2021-10-03 12:10:21,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141493071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:21,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885815452] [2021-10-03 12:10:21,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:10:21,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:21,918 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) [2021-10-03 12:10:21,939 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 [2021-10-03 12:10:22,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 12:10:22,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:22,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:22,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:22,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885815452] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:22,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:22,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:22,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244043052] [2021-10-03 12:10:22,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:22,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:22,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:22,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:22,731 INFO L87 Difference]: Start difference. First operand 64 states and 137 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:23,130 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-10-03 12:10:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-03 12:10:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:23,131 INFO L225 Difference]: With dead ends: 106 [2021-10-03 12:10:23,131 INFO L226 Difference]: Without dead ends: 96 [2021-10-03 12:10:23,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:10:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-03 12:10:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 58. [2021-10-03 12:10:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 122 transitions. [2021-10-03 12:10:23,134 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 122 transitions. Word has length 15 [2021-10-03 12:10:23,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:23,135 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 122 transitions. [2021-10-03 12:10:23,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:23,135 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 122 transitions. [2021-10-03 12:10:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:10:23,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:23,136 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:23,164 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 [2021-10-03 12:10:23,342 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,SelfDestructingSolverStorable34 [2021-10-03 12:10:23,343 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash -723974146, now seen corresponding path program 19 times [2021-10-03 12:10:23,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:23,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495947816] [2021-10-03 12:10:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:23,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:23,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:23,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495947816] [2021-10-03 12:10:23,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495947816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:23,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45767856] [2021-10-03 12:10:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:10:23,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:23,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:23,447 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) [2021-10-03 12:10:23,472 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 [2021-10-03 12:10:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:23,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:23,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:24,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45767856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:24,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:24,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:10:24,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525295253] [2021-10-03 12:10:24,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:24,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:24,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:24,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:24,229 INFO L87 Difference]: Start difference. First operand 58 states and 122 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:24,463 INFO L93 Difference]: Finished difference Result 74 states and 143 transitions. [2021-10-03 12:10:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-03 12:10:24,464 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:10:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:24,464 INFO L225 Difference]: With dead ends: 74 [2021-10-03 12:10:24,465 INFO L226 Difference]: Without dead ends: 54 [2021-10-03 12:10:24,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:10:24,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-03 12:10:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-03 12:10:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.150943396226415) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 114 transitions. [2021-10-03 12:10:24,468 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 114 transitions. Word has length 15 [2021-10-03 12:10:24,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:24,469 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 114 transitions. [2021-10-03 12:10:24,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 114 transitions. [2021-10-03 12:10:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:24,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:24,470 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:24,495 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 [2021-10-03 12:10:24,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:24,673 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:24,673 INFO L82 PathProgramCache]: Analyzing trace with hash -681512068, now seen corresponding path program 11 times [2021-10-03 12:10:24,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:24,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45876526] [2021-10-03 12:10:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:24,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:24,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:24,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45876526] [2021-10-03 12:10:24,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45876526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:24,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425640526] [2021-10-03 12:10:24,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:10:24,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:24,792 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) [2021-10-03 12:10:24,820 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 [2021-10-03 12:10:25,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:25,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:25,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:25,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:25,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425640526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:25,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:25,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-03 12:10:25,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306087971] [2021-10-03 12:10:25,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:25,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:25,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:25,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:25,514 INFO L87 Difference]: Start difference. First operand 54 states and 114 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:25,776 INFO L93 Difference]: Finished difference Result 106 states and 206 transitions. [2021-10-03 12:10:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:10:25,776 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:25,778 INFO L225 Difference]: With dead ends: 106 [2021-10-03 12:10:25,778 INFO L226 Difference]: Without dead ends: 96 [2021-10-03 12:10:25,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:10:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-03 12:10:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2021-10-03 12:10:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-10-03 12:10:25,782 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 16 [2021-10-03 12:10:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:25,782 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-10-03 12:10:25,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-10-03 12:10:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:25,783 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:25,784 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:25,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-03 12:10:25,997 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,SelfDestructingSolverStorable36 [2021-10-03 12:10:25,998 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:25,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1773301380, now seen corresponding path program 12 times [2021-10-03 12:10:25,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:25,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407197958] [2021-10-03 12:10:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:26,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:26,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:26,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407197958] [2021-10-03 12:10:26,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407197958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:26,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232800246] [2021-10-03 12:10:26,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:10:26,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:26,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:26,127 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) [2021-10-03 12:10:26,128 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 [2021-10-03 12:10:26,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 12:10:26,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:26,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:26,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:26,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232800246] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:26,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:26,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-03 12:10:26,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136623635] [2021-10-03 12:10:26,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:26,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:26,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:26,889 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:27,144 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2021-10-03 12:10:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 12:10:27,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:27,146 INFO L225 Difference]: With dead ends: 132 [2021-10-03 12:10:27,146 INFO L226 Difference]: Without dead ends: 122 [2021-10-03 12:10:27,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:10:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-03 12:10:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-10-03 12:10:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.152941176470588) internal successors, (183), 85 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 183 transitions. [2021-10-03 12:10:27,151 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 183 transitions. Word has length 16 [2021-10-03 12:10:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:27,151 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 183 transitions. [2021-10-03 12:10:27,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 183 transitions. [2021-10-03 12:10:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:27,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:27,153 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:27,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-03 12:10:27,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-03 12:10:27,367 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:27,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:27,368 INFO L82 PathProgramCache]: Analyzing trace with hash 416830752, now seen corresponding path program 13 times [2021-10-03 12:10:27,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:27,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129928093] [2021-10-03 12:10:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:27,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:27,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:27,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129928093] [2021-10-03 12:10:27,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129928093] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:27,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870106389] [2021-10-03 12:10:27,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:10:27,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:27,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:27,505 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) [2021-10-03 12:10:27,528 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 [2021-10-03 12:10:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:27,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:27,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:28,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870106389] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:28,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:28,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-03 12:10:28,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049390669] [2021-10-03 12:10:28,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:28,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:28,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:28,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:28,260 INFO L87 Difference]: Start difference. First operand 86 states and 183 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:28,546 INFO L93 Difference]: Finished difference Result 152 states and 304 transitions. [2021-10-03 12:10:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-03 12:10:28,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:28,551 INFO L225 Difference]: With dead ends: 152 [2021-10-03 12:10:28,551 INFO L226 Difference]: Without dead ends: 142 [2021-10-03 12:10:28,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:10:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-03 12:10:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 96. [2021-10-03 12:10:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 219 transitions. [2021-10-03 12:10:28,558 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 219 transitions. Word has length 16 [2021-10-03 12:10:28,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:28,558 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 219 transitions. [2021-10-03 12:10:28,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:28,558 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 219 transitions. [2021-10-03 12:10:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:28,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:28,559 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:28,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-03 12:10:28,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-03 12:10:28,766 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:28,767 INFO L82 PathProgramCache]: Analyzing trace with hash 472242012, now seen corresponding path program 14 times [2021-10-03 12:10:28,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:28,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258590223] [2021-10-03 12:10:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:28,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:28,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:28,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258590223] [2021-10-03 12:10:28,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258590223] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:28,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522046215] [2021-10-03 12:10:28,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:10:28,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:28,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:28,907 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) [2021-10-03 12:10:28,908 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 [2021-10-03 12:10:29,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:29,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:29,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:29,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522046215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:29,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:29,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-03 12:10:29,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088143888] [2021-10-03 12:10:29,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:29,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:29,672 INFO L87 Difference]: Start difference. First operand 96 states and 219 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:29,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:29,954 INFO L93 Difference]: Finished difference Result 136 states and 283 transitions. [2021-10-03 12:10:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:10:29,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:29,956 INFO L225 Difference]: With dead ends: 136 [2021-10-03 12:10:29,956 INFO L226 Difference]: Without dead ends: 126 [2021-10-03 12:10:29,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:10:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-03 12:10:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 92. [2021-10-03 12:10:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.2857142857142856) internal successors, (208), 91 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:29,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 208 transitions. [2021-10-03 12:10:29,960 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 208 transitions. Word has length 16 [2021-10-03 12:10:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:29,960 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 208 transitions. [2021-10-03 12:10:29,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:29,960 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 208 transitions. [2021-10-03 12:10:29,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:29,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:29,961 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:29,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-03 12:10:30,162 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,SelfDestructingSolverStorable39 [2021-10-03 12:10:30,162 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:30,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1389237814, now seen corresponding path program 15 times [2021-10-03 12:10:30,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:30,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871737011] [2021-10-03 12:10:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:30,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:30,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:30,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871737011] [2021-10-03 12:10:30,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871737011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:30,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885026528] [2021-10-03 12:10:30,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:10:30,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:30,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:30,275 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) [2021-10-03 12:10:30,297 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 [2021-10-03 12:10:30,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:10:30,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:30,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:30,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885026528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:31,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:31,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-03 12:10:31,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085592104] [2021-10-03 12:10:31,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:31,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:31,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:31,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:31,068 INFO L87 Difference]: Start difference. First operand 92 states and 208 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:31,353 INFO L93 Difference]: Finished difference Result 140 states and 296 transitions. [2021-10-03 12:10:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:10:31,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:31,355 INFO L225 Difference]: With dead ends: 140 [2021-10-03 12:10:31,355 INFO L226 Difference]: Without dead ends: 122 [2021-10-03 12:10:31,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:10:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-03 12:10:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 104. [2021-10-03 12:10:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2718446601941746) internal successors, (234), 103 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 234 transitions. [2021-10-03 12:10:31,360 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 234 transitions. Word has length 16 [2021-10-03 12:10:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:31,360 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 234 transitions. [2021-10-03 12:10:31,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 234 transitions. [2021-10-03 12:10:31,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:31,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:31,361 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:31,390 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 [2021-10-03 12:10:31,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:31,567 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:31,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1190359006, now seen corresponding path program 16 times [2021-10-03 12:10:31,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:31,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916852362] [2021-10-03 12:10:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:31,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:31,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:31,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916852362] [2021-10-03 12:10:31,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916852362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:31,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2887819] [2021-10-03 12:10:31,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:10:31,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:31,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:31,684 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) [2021-10-03 12:10:31,685 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 [2021-10-03 12:10:32,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:10:32,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:32,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:32,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:32,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2887819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:32,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:32,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-03 12:10:32,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016908342] [2021-10-03 12:10:32,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:10:32,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:10:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:10:32,444 INFO L87 Difference]: Start difference. First operand 104 states and 234 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:32,764 INFO L93 Difference]: Finished difference Result 174 states and 352 transitions. [2021-10-03 12:10:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:10:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:32,766 INFO L225 Difference]: With dead ends: 174 [2021-10-03 12:10:32,766 INFO L226 Difference]: Without dead ends: 160 [2021-10-03 12:10:32,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:10:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-03 12:10:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2021-10-03 12:10:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.3333333333333335) internal successors, (259), 111 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 259 transitions. [2021-10-03 12:10:32,771 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 259 transitions. Word has length 16 [2021-10-03 12:10:32,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:32,772 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 259 transitions. [2021-10-03 12:10:32,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 259 transitions. [2021-10-03 12:10:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:32,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:32,773 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:32,818 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 [2021-10-03 12:10:32,987 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,SelfDestructingSolverStorable41 [2021-10-03 12:10:32,987 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1134947746, now seen corresponding path program 17 times [2021-10-03 12:10:32,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:32,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033240652] [2021-10-03 12:10:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:32,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:33,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:33,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033240652] [2021-10-03 12:10:33,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033240652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:33,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93677684] [2021-10-03 12:10:33,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:10:33,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:33,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:33,107 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) [2021-10-03 12:10:33,121 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 [2021-10-03 12:10:33,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:33,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-03 12:10:33,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:34,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93677684] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:34,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:34,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-03 12:10:34,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927036795] [2021-10-03 12:10:34,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:10:34,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:34,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:10:34,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:10:34,020 INFO L87 Difference]: Start difference. First operand 112 states and 259 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2021-10-03 12:10:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:34,415 INFO L93 Difference]: Finished difference Result 158 states and 332 transitions. [2021-10-03 12:10:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-03 12:10:34,416 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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 16 [2021-10-03 12:10:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:34,418 INFO L225 Difference]: With dead ends: 158 [2021-10-03 12:10:34,418 INFO L226 Difference]: Without dead ends: 148 [2021-10-03 12:10:34,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:10:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-03 12:10:34,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2021-10-03 12:10:34,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.2475247524752477) internal successors, (227), 101 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 227 transitions. [2021-10-03 12:10:34,423 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 227 transitions. Word has length 16 [2021-10-03 12:10:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:34,424 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 227 transitions. [2021-10-03 12:10:34,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2021-10-03 12:10:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 227 transitions. [2021-10-03 12:10:34,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:34,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:34,425 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:34,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-03 12:10:34,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:34,641 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash 441303228, now seen corresponding path program 18 times [2021-10-03 12:10:34,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:34,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979448615] [2021-10-03 12:10:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:34,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:34,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:34,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979448615] [2021-10-03 12:10:34,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979448615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:34,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828701096] [2021-10-03 12:10:34,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:10:34,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:34,775 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) [2021-10-03 12:10:34,794 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 [2021-10-03 12:10:35,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 12:10:35,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:35,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:35,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828701096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:35,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:35,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-03 12:10:35,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306905822] [2021-10-03 12:10:35,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:10:35,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:35,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:10:35,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:35,602 INFO L87 Difference]: Start difference. First operand 102 states and 227 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:35,828 INFO L93 Difference]: Finished difference Result 142 states and 293 transitions. [2021-10-03 12:10:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 12:10:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:35,830 INFO L225 Difference]: With dead ends: 142 [2021-10-03 12:10:35,830 INFO L226 Difference]: Without dead ends: 132 [2021-10-03 12:10:35,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:10:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-03 12:10:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2021-10-03 12:10:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2718446601941746) internal successors, (234), 103 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 234 transitions. [2021-10-03 12:10:35,834 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 234 transitions. Word has length 16 [2021-10-03 12:10:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:35,835 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 234 transitions. [2021-10-03 12:10:35,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 234 transitions. [2021-10-03 12:10:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:35,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:35,835 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:35,862 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 [2021-10-03 12:10:36,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-03 12:10:36,037 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1663531936, now seen corresponding path program 19 times [2021-10-03 12:10:36,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:36,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871504401] [2021-10-03 12:10:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:36,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:36,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:36,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871504401] [2021-10-03 12:10:36,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871504401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:36,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725263542] [2021-10-03 12:10:36,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:10:36,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:36,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:36,156 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) [2021-10-03 12:10:36,176 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 [2021-10-03 12:10:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:36,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725263542] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:36,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:36,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-03 12:10:36,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429784505] [2021-10-03 12:10:36,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:10:36,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:36,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:10:36,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:36,952 INFO L87 Difference]: Start difference. First operand 104 states and 234 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:37,182 INFO L93 Difference]: Finished difference Result 174 states and 348 transitions. [2021-10-03 12:10:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:10:37,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:37,184 INFO L225 Difference]: With dead ends: 174 [2021-10-03 12:10:37,184 INFO L226 Difference]: Without dead ends: 160 [2021-10-03 12:10:37,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:10:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-03 12:10:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 108. [2021-10-03 12:10:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.308411214953271) internal successors, (247), 107 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 247 transitions. [2021-10-03 12:10:37,189 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 247 transitions. Word has length 16 [2021-10-03 12:10:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:37,190 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 247 transitions. [2021-10-03 12:10:37,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 247 transitions. [2021-10-03 12:10:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:37,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:37,191 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:37,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-10-03 12:10:37,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:37,405 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1608120676, now seen corresponding path program 20 times [2021-10-03 12:10:37,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:37,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012994491] [2021-10-03 12:10:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:37,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:37,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:37,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012994491] [2021-10-03 12:10:37,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012994491] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:37,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673544906] [2021-10-03 12:10:37,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:10:37,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:37,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:37,527 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) [2021-10-03 12:10:37,554 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 [2021-10-03 12:10:38,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:38,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:38,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:38,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:38,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673544906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:38,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:38,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-03 12:10:38,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882185658] [2021-10-03 12:10:38,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:10:38,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:38,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:10:38,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:38,355 INFO L87 Difference]: Start difference. First operand 108 states and 247 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:38,573 INFO L93 Difference]: Finished difference Result 154 states and 321 transitions. [2021-10-03 12:10:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:10:38,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:38,574 INFO L225 Difference]: With dead ends: 154 [2021-10-03 12:10:38,574 INFO L226 Difference]: Without dead ends: 144 [2021-10-03 12:10:38,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:10:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-03 12:10:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 94. [2021-10-03 12:10:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.182795698924731) internal successors, (203), 93 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 203 transitions. [2021-10-03 12:10:38,578 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 203 transitions. Word has length 16 [2021-10-03 12:10:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:38,579 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 203 transitions. [2021-10-03 12:10:38,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 203 transitions. [2021-10-03 12:10:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:38,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:38,579 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:38,615 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 [2021-10-03 12:10:38,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:38,791 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash -71998474, now seen corresponding path program 21 times [2021-10-03 12:10:38,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:38,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465451100] [2021-10-03 12:10:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:38,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:38,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:38,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465451100] [2021-10-03 12:10:38,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465451100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:38,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250228410] [2021-10-03 12:10:38,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:10:38,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:38,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:38,901 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) [2021-10-03 12:10:38,921 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 [2021-10-03 12:10:39,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:10:39,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:39,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:39,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:39,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250228410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:39,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:39,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-03 12:10:39,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610342177] [2021-10-03 12:10:39,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:10:39,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:39,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:10:39,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:39,774 INFO L87 Difference]: Start difference. First operand 94 states and 203 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:40,043 INFO L93 Difference]: Finished difference Result 128 states and 265 transitions. [2021-10-03 12:10:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:10:40,044 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:40,047 INFO L225 Difference]: With dead ends: 128 [2021-10-03 12:10:40,047 INFO L226 Difference]: Without dead ends: 112 [2021-10-03 12:10:40,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:10:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-03 12:10:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2021-10-03 12:10:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2371134020618557) internal successors, (217), 97 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 217 transitions. [2021-10-03 12:10:40,051 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 217 transitions. Word has length 16 [2021-10-03 12:10:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:40,052 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 217 transitions. [2021-10-03 12:10:40,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 217 transitions. [2021-10-03 12:10:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:40,053 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:40,053 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:40,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-03 12:10:40,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-03 12:10:40,268 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:40,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1643372002, now seen corresponding path program 22 times [2021-10-03 12:10:40,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:40,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351424209] [2021-10-03 12:10:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:40,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:40,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:40,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351424209] [2021-10-03 12:10:40,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351424209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:40,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97162262] [2021-10-03 12:10:40,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:10:40,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:40,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:40,391 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) [2021-10-03 12:10:40,418 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 [2021-10-03 12:10:41,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:10:41,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:41,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:41,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:41,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97162262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:41,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:41,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-03 12:10:41,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177434086] [2021-10-03 12:10:41,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:10:41,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:41,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:10:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:41,237 INFO L87 Difference]: Start difference. First operand 98 states and 217 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:41,532 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-10-03 12:10:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:10:41,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:41,534 INFO L225 Difference]: With dead ends: 164 [2021-10-03 12:10:41,534 INFO L226 Difference]: Without dead ends: 150 [2021-10-03 12:10:41,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:10:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-03 12:10:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 106. [2021-10-03 12:10:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.3047619047619046) internal successors, (242), 105 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 242 transitions. [2021-10-03 12:10:41,538 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 242 transitions. Word has length 16 [2021-10-03 12:10:41,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:41,538 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 242 transitions. [2021-10-03 12:10:41,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 242 transitions. [2021-10-03 12:10:41,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:41,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:41,540 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:41,572 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 [2021-10-03 12:10:41,753 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,SelfDestructingSolverStorable47 [2021-10-03 12:10:41,754 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:41,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:41,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1698783262, now seen corresponding path program 23 times [2021-10-03 12:10:41,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:41,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436368788] [2021-10-03 12:10:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:41,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:41,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:41,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436368788] [2021-10-03 12:10:41,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436368788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:41,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865688202] [2021-10-03 12:10:41,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:10:41,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:41,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:41,868 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) [2021-10-03 12:10:41,891 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 [2021-10-03 12:10:42,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:42,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-03 12:10:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:42,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865688202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:42,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:42,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-03 12:10:42,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147293924] [2021-10-03 12:10:42,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:10:42,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:42,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:10:42,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:10:42,786 INFO L87 Difference]: Start difference. First operand 106 states and 242 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2021-10-03 12:10:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:43,114 INFO L93 Difference]: Finished difference Result 148 states and 308 transitions. [2021-10-03 12:10:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:10:43,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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 16 [2021-10-03 12:10:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:43,116 INFO L225 Difference]: With dead ends: 148 [2021-10-03 12:10:43,116 INFO L226 Difference]: Without dead ends: 138 [2021-10-03 12:10:43,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 338.4ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:10:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-03 12:10:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2021-10-03 12:10:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 214 transitions. [2021-10-03 12:10:43,121 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 214 transitions. Word has length 16 [2021-10-03 12:10:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:43,121 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 214 transitions. [2021-10-03 12:10:43,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2021-10-03 12:10:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 214 transitions. [2021-10-03 12:10:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:43,122 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:43,123 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:43,165 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 [2021-10-03 12:10:43,331 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,SelfDestructingSolverStorable48 [2021-10-03 12:10:43,332 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1420500810, now seen corresponding path program 24 times [2021-10-03 12:10:43,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:43,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788991987] [2021-10-03 12:10:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:43,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:43,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:43,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788991987] [2021-10-03 12:10:43,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788991987] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:43,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120124472] [2021-10-03 12:10:43,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:10:43,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:43,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:43,490 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) [2021-10-03 12:10:43,507 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 [2021-10-03 12:10:44,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 12:10:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:44,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:44,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:44,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120124472] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:44,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:44,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-03 12:10:44,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762566864] [2021-10-03 12:10:44,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:10:44,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:10:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:44,388 INFO L87 Difference]: Start difference. First operand 96 states and 214 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:44,600 INFO L93 Difference]: Finished difference Result 136 states and 280 transitions. [2021-10-03 12:10:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 12:10:44,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:44,602 INFO L225 Difference]: With dead ends: 136 [2021-10-03 12:10:44,602 INFO L226 Difference]: Without dead ends: 126 [2021-10-03 12:10:44,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:10:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-03 12:10:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2021-10-03 12:10:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2783505154639174) internal successors, (221), 97 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2021-10-03 12:10:44,606 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 16 [2021-10-03 12:10:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:44,607 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2021-10-03 12:10:44,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2021-10-03 12:10:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:44,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:44,608 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:44,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-03 12:10:44,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:44,824 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 769631322, now seen corresponding path program 25 times [2021-10-03 12:10:44,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:44,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920502921] [2021-10-03 12:10:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:44,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:44,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:44,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920502921] [2021-10-03 12:10:44,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920502921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:44,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436860726] [2021-10-03 12:10:44,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:10:44,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:44,942 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) [2021-10-03 12:10:44,966 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 [2021-10-03 12:10:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:45,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:45,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436860726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:45,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:45,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-03 12:10:45,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762072975] [2021-10-03 12:10:45,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:10:45,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:45,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:10:45,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:45,837 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:46,071 INFO L93 Difference]: Finished difference Result 168 states and 335 transitions. [2021-10-03 12:10:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:10:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:46,074 INFO L225 Difference]: With dead ends: 168 [2021-10-03 12:10:46,074 INFO L226 Difference]: Without dead ends: 154 [2021-10-03 12:10:46,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:10:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-03 12:10:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 102. [2021-10-03 12:10:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3168316831683167) internal successors, (234), 101 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 234 transitions. [2021-10-03 12:10:46,079 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 234 transitions. Word has length 16 [2021-10-03 12:10:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:46,080 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 234 transitions. [2021-10-03 12:10:46,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 234 transitions. [2021-10-03 12:10:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:10:46,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:46,081 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:46,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-03 12:10:46,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:46,294 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash 825042582, now seen corresponding path program 26 times [2021-10-03 12:10:46,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:46,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597030318] [2021-10-03 12:10:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:46,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:46,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:46,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597030318] [2021-10-03 12:10:46,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597030318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:46,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589538418] [2021-10-03 12:10:46,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:10:46,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:46,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:46,425 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) [2021-10-03 12:10:46,426 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 [2021-10-03 12:10:47,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:47,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:47,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:10:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:47,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589538418] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:47,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:47,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-03 12:10:47,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6502023] [2021-10-03 12:10:47,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:10:47,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:10:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:10:47,358 INFO L87 Difference]: Start difference. First operand 102 states and 234 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:47,593 INFO L93 Difference]: Finished difference Result 148 states and 308 transitions. [2021-10-03 12:10:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:10:47,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-03 12:10:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:47,595 INFO L225 Difference]: With dead ends: 148 [2021-10-03 12:10:47,595 INFO L226 Difference]: Without dead ends: 138 [2021-10-03 12:10:47,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:10:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-03 12:10:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 86. [2021-10-03 12:10:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.2) internal successors, (187), 85 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 187 transitions. [2021-10-03 12:10:47,615 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 187 transitions. Word has length 16 [2021-10-03 12:10:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:47,615 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 187 transitions. [2021-10-03 12:10:47,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 187 transitions. [2021-10-03 12:10:47,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:10:47,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:47,616 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:47,660 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 [2021-10-03 12:10:47,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:47,829 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:47,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:47,830 INFO L82 PathProgramCache]: Analyzing trace with hash 348525074, now seen corresponding path program 27 times [2021-10-03 12:10:47,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:47,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186655886] [2021-10-03 12:10:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:47,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:47,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:47,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186655886] [2021-10-03 12:10:47,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186655886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:47,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849448081] [2021-10-03 12:10:47,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:10:47,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:47,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:47,954 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) [2021-10-03 12:10:47,955 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 [2021-10-03 12:10:48,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:10:48,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:10:48,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:48,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849448081] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:48,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:48,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-03 12:10:48,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095952703] [2021-10-03 12:10:48,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:10:48,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:10:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:10:48,938 INFO L87 Difference]: Start difference. First operand 86 states and 187 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:49,250 INFO L93 Difference]: Finished difference Result 120 states and 241 transitions. [2021-10-03 12:10:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 12:10:49,251 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 17 [2021-10-03 12:10:49,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:49,252 INFO L225 Difference]: With dead ends: 120 [2021-10-03 12:10:49,252 INFO L226 Difference]: Without dead ends: 74 [2021-10-03 12:10:49,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:10:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-03 12:10:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-03 12:10:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2054794520547945) internal successors, (161), 73 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 161 transitions. [2021-10-03 12:10:49,255 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 161 transitions. Word has length 17 [2021-10-03 12:10:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:49,255 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 161 transitions. [2021-10-03 12:10:49,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 161 transitions. [2021-10-03 12:10:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:10:49,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:49,256 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:49,290 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 [2021-10-03 12:10:49,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:49,457 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:49,458 INFO L82 PathProgramCache]: Analyzing trace with hash 862794770, now seen corresponding path program 28 times [2021-10-03 12:10:49,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:49,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599645948] [2021-10-03 12:10:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:49,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:49,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:49,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599645948] [2021-10-03 12:10:49,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599645948] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:49,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71776525] [2021-10-03 12:10:49,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:10:49,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:49,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:49,603 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) [2021-10-03 12:10:49,605 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 [2021-10-03 12:10:50,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:10:50,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:50,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:10:50,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:50,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71776525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:50,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:50,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-03 12:10:50,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110766548] [2021-10-03 12:10:50,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:10:50,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:10:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:10:50,595 INFO L87 Difference]: Start difference. First operand 74 states and 161 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:50,967 INFO L93 Difference]: Finished difference Result 114 states and 234 transitions. [2021-10-03 12:10:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:10:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 17 [2021-10-03 12:10:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:50,969 INFO L225 Difference]: With dead ends: 114 [2021-10-03 12:10:50,969 INFO L226 Difference]: Without dead ends: 80 [2021-10-03 12:10:50,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 421.8ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-10-03 12:10:50,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-03 12:10:50,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-03 12:10:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.2278481012658227) internal successors, (176), 79 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:50,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 176 transitions. [2021-10-03 12:10:50,972 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 176 transitions. Word has length 17 [2021-10-03 12:10:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:50,973 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 176 transitions. [2021-10-03 12:10:50,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:50,973 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 176 transitions. [2021-10-03 12:10:50,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:10:50,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:50,974 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:51,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-03 12:10:51,189 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,SelfDestructingSolverStorable53 [2021-10-03 12:10:51,190 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:51,190 INFO L82 PathProgramCache]: Analyzing trace with hash 908800876, now seen corresponding path program 29 times [2021-10-03 12:10:51,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:51,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447685252] [2021-10-03 12:10:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:51,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:51,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:51,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447685252] [2021-10-03 12:10:51,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447685252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:51,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354601386] [2021-10-03 12:10:51,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:10:51,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:51,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:51,308 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) [2021-10-03 12:10:51,309 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 [2021-10-03 12:10:52,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:52,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:52,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:10:52,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:52,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354601386] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:52,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:52,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-03 12:10:52,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911168918] [2021-10-03 12:10:52,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:10:52,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:52,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:10:52,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:10:52,349 INFO L87 Difference]: Start difference. First operand 80 states and 176 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:52,774 INFO L93 Difference]: Finished difference Result 140 states and 287 transitions. [2021-10-03 12:10:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:10:52,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 17 [2021-10-03 12:10:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:52,776 INFO L225 Difference]: With dead ends: 140 [2021-10-03 12:10:52,776 INFO L226 Difference]: Without dead ends: 114 [2021-10-03 12:10:52,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:10:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-03 12:10:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2021-10-03 12:10:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.2941176470588234) internal successors, (195), 85 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) [2021-10-03 12:10:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 195 transitions. [2021-10-03 12:10:52,780 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 195 transitions. Word has length 17 [2021-10-03 12:10:52,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:52,780 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 195 transitions. [2021-10-03 12:10:52,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 195 transitions. [2021-10-03 12:10:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:10:52,780 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:52,781 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:52,808 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 [2021-10-03 12:10:52,981 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,SelfDestructingSolverStorable54 [2021-10-03 12:10:52,982 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:52,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1196034288, now seen corresponding path program 30 times [2021-10-03 12:10:52,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:52,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713307345] [2021-10-03 12:10:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:52,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:53,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:53,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713307345] [2021-10-03 12:10:53,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713307345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:53,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900982087] [2021-10-03 12:10:53,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:10:53,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:53,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:53,115 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:10:53,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-03 12:10:53,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:10:53,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:53,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:10:53,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:54,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900982087] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:54,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:54,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-03 12:10:54,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915774720] [2021-10-03 12:10:54,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:10:54,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:54,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:10:54,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:10:54,177 INFO L87 Difference]: Start difference. First operand 86 states and 195 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:54,648 INFO L93 Difference]: Finished difference Result 124 states and 247 transitions. [2021-10-03 12:10:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-03 12:10:54,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 17 [2021-10-03 12:10:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:54,650 INFO L225 Difference]: With dead ends: 124 [2021-10-03 12:10:54,650 INFO L226 Difference]: Without dead ends: 114 [2021-10-03 12:10:54,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:10:54,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-03 12:10:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2021-10-03 12:10:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 205 transitions. [2021-10-03 12:10:54,654 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 205 transitions. Word has length 17 [2021-10-03 12:10:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:54,654 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 205 transitions. [2021-10-03 12:10:54,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 205 transitions. [2021-10-03 12:10:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:10:54,655 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:54,655 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:54,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-10-03 12:10:54,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-03 12:10:54,871 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1140623028, now seen corresponding path program 31 times [2021-10-03 12:10:54,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:54,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814810565] [2021-10-03 12:10:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:54,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:55,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:55,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814810565] [2021-10-03 12:10:55,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814810565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:55,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523516713] [2021-10-03 12:10:55,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:10:55,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:55,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:55,007 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:10:55,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-03 12:10:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:55,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:10:55,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:56,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523516713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:56,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:56,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-03 12:10:56,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731216012] [2021-10-03 12:10:56,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:10:56,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:10:56,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:10:56,054 INFO L87 Difference]: Start difference. First operand 90 states and 205 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:56,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:56,479 INFO L93 Difference]: Finished difference Result 112 states and 233 transitions. [2021-10-03 12:10:56,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-03 12:10:56,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 17 [2021-10-03 12:10:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:56,481 INFO L225 Difference]: With dead ends: 112 [2021-10-03 12:10:56,481 INFO L226 Difference]: Without dead ends: 94 [2021-10-03 12:10:56,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:10:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-03 12:10:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-10-03 12:10:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.258426966292135) internal successors, (201), 89 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 201 transitions. [2021-10-03 12:10:56,483 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 201 transitions. Word has length 17 [2021-10-03 12:10:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:56,484 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 201 transitions. [2021-10-03 12:10:56,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 201 transitions. [2021-10-03 12:10:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:10:56,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:56,484 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:56,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-03 12:10:56,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:56,685 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1669441366, now seen corresponding path program 32 times [2021-10-03 12:10:56,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:56,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696875167] [2021-10-03 12:10:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:56,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:56,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:56,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696875167] [2021-10-03 12:10:56,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696875167] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:56,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655335079] [2021-10-03 12:10:56,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:10:56,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:56,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:56,809 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:10:56,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-03 12:10:57,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:10:57,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:57,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:10:57,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:57,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655335079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:57,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:57,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-03 12:10:57,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883749166] [2021-10-03 12:10:57,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:10:57,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:57,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:10:57,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:10:57,881 INFO L87 Difference]: Start difference. First operand 90 states and 201 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:10:58,406 INFO L93 Difference]: Finished difference Result 206 states and 435 transitions. [2021-10-03 12:10:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:10:58,407 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 17 [2021-10-03 12:10:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:10:58,409 INFO L225 Difference]: With dead ends: 206 [2021-10-03 12:10:58,409 INFO L226 Difference]: Without dead ends: 156 [2021-10-03 12:10:58,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:10:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-03 12:10:58,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 108. [2021-10-03 12:10:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.317757009345794) internal successors, (248), 107 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:10:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 248 transitions. [2021-10-03 12:10:58,413 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 248 transitions. Word has length 17 [2021-10-03 12:10:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:10:58,413 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 248 transitions. [2021-10-03 12:10:58,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:10:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 248 transitions. [2021-10-03 12:10:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:10:58,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:10:58,414 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:10:58,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-03 12:10:58,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-03 12:10:58,619 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:10:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:10:58,620 INFO L82 PathProgramCache]: Analyzing trace with hash 520690766, now seen corresponding path program 33 times [2021-10-03 12:10:58,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:10:58,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072300552] [2021-10-03 12:10:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:10:58,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:10:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:10:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:58,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:10:58,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072300552] [2021-10-03 12:10:58,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072300552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:58,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003599021] [2021-10-03 12:10:58,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:10:58,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:10:58,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:10:58,757 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:10:58,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-03 12:10:59,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:10:59,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:10:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:10:59,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:10:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:10:59,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003599021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:10:59,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:10:59,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-03 12:10:59,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860690797] [2021-10-03 12:10:59,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:10:59,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:10:59,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:10:59,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:10:59,835 INFO L87 Difference]: Start difference. First operand 108 states and 248 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:11:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:11:00,338 INFO L93 Difference]: Finished difference Result 188 states and 386 transitions. [2021-10-03 12:11:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:11:00,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 17 [2021-10-03 12:11:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:11:00,341 INFO L225 Difference]: With dead ends: 188 [2021-10-03 12:11:00,341 INFO L226 Difference]: Without dead ends: 178 [2021-10-03 12:11:00,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 478.8ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-10-03 12:11:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-03 12:11:00,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 122. [2021-10-03 12:11:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.3884297520661155) internal successors, (289), 121 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:11:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 289 transitions. [2021-10-03 12:11:00,345 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 289 transitions. Word has length 17 [2021-10-03 12:11:00,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:11:00,346 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 289 transitions. [2021-10-03 12:11:00,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:11:00,346 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 289 transitions. [2021-10-03 12:11:00,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:11:00,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:11:00,347 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:11:00,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-03 12:11:00,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:00,548 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:11:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:11:00,549 INFO L82 PathProgramCache]: Analyzing trace with hash 576102026, now seen corresponding path program 34 times [2021-10-03 12:11:00,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:11:00,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582881856] [2021-10-03 12:11:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:11:00,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:11:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:11:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:00,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:11:00,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582881856] [2021-10-03 12:11:00,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582881856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:00,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812523437] [2021-10-03 12:11:00,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:11:00,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:00,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:11:00,702 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:11:00,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-03 12:11:01,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:11:01,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:11:01,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:11:01,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:11:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:01,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812523437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:01,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:11:01,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-03 12:11:01,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623152048] [2021-10-03 12:11:01,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:11:01,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:11:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:11:01,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:11:01,828 INFO L87 Difference]: Start difference. First operand 122 states and 289 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:11:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:11:02,308 INFO L93 Difference]: Finished difference Result 174 states and 369 transitions. [2021-10-03 12:11:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:11:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 17 [2021-10-03 12:11:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:11:02,310 INFO L225 Difference]: With dead ends: 174 [2021-10-03 12:11:02,310 INFO L226 Difference]: Without dead ends: 156 [2021-10-03 12:11:02,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 474.4ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-10-03 12:11:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-03 12:11:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 108. [2021-10-03 12:11:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.317757009345794) internal successors, (248), 107 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:11:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 248 transitions. [2021-10-03 12:11:02,314 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 248 transitions. Word has length 17 [2021-10-03 12:11:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:11:02,314 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 248 transitions. [2021-10-03 12:11:02,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-10-03 12:11:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 248 transitions. [2021-10-03 12:11:02,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:11:02,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:11:02,315 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:11:02,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-10-03 12:11:02,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-03 12:11:02,516 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:11:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:11:02,517 INFO L82 PathProgramCache]: Analyzing trace with hash 276873962, now seen corresponding path program 35 times [2021-10-03 12:11:02,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:11:02,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369195386] [2021-10-03 12:11:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:11:02,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:11:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:11:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:02,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:11:02,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369195386] [2021-10-03 12:11:02,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369195386] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:02,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307058557] [2021-10-03 12:11:02,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:11:02,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:02,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:11:02,647 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:11:02,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-03 12:11:03,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:11:03,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:11:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-03 12:11:03,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:11:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:03,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307058557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:03,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:11:03,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-03 12:11:03,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606707403] [2021-10-03 12:11:03,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:11:03,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:11:03,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:11:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:11:03,785 INFO L87 Difference]: Start difference. First operand 108 states and 248 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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) [2021-10-03 12:11:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:11:04,299 INFO L93 Difference]: Finished difference Result 170 states and 350 transitions. [2021-10-03 12:11:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-03 12:11:04,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-03 12:11:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:11:04,301 INFO L225 Difference]: With dead ends: 170 [2021-10-03 12:11:04,301 INFO L226 Difference]: Without dead ends: 120 [2021-10-03 12:11:04,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 540.8ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-10-03 12:11:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-03 12:11:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 88. [2021-10-03 12:11:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.310344827586207) internal successors, (201), 87 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:11:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2021-10-03 12:11:04,305 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 17 [2021-10-03 12:11:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:11:04,305 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2021-10-03 12:11:04,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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) [2021-10-03 12:11:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2021-10-03 12:11:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:11:04,306 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:11:04,306 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:11:04,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-03 12:11:04,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:04,522 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:11:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:11:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1827961202, now seen corresponding path program 36 times [2021-10-03 12:11:04,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:11:04,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026997406] [2021-10-03 12:11:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:11:04,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:11:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:11:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:04,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:11:04,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026997406] [2021-10-03 12:11:04,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026997406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:04,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038741379] [2021-10-03 12:11:04,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:11:04,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:04,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:11:04,693 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:11:04,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-03 12:11:05,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:11:05,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:11:05,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-03 12:11:05,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:11:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:05,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038741379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:05,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:11:05,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-03 12:11:05,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252014931] [2021-10-03 12:11:05,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:11:05,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:11:05,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:11:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:11:05,883 INFO L87 Difference]: Start difference. First operand 88 states and 201 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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) [2021-10-03 12:11:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:11:06,322 INFO L93 Difference]: Finished difference Result 134 states and 265 transitions. [2021-10-03 12:11:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:11:06,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-03 12:11:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:11:06,338 INFO L225 Difference]: With dead ends: 134 [2021-10-03 12:11:06,338 INFO L226 Difference]: Without dead ends: 124 [2021-10-03 12:11:06,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:11:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-03 12:11:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2021-10-03 12:11:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.310344827586207) internal successors, (201), 87 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:11:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2021-10-03 12:11:06,341 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 17 [2021-10-03 12:11:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:11:06,341 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2021-10-03 12:11:06,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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) [2021-10-03 12:11:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2021-10-03 12:11:06,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:11:06,342 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:11:06,342 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:11:06,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-03 12:11:06,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:06,544 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:11:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:11:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1772549942, now seen corresponding path program 37 times [2021-10-03 12:11:06,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:11:06,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101460866] [2021-10-03 12:11:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:11:06,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:11:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:11:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:06,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:11:06,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101460866] [2021-10-03 12:11:06,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101460866] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:06,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271860026] [2021-10-03 12:11:06,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:11:06,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:06,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:11:06,674 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:11:06,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-03 12:11:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:11:07,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:11:07,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:11:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:07,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271860026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:07,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:11:07,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-03 12:11:07,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712922885] [2021-10-03 12:11:07,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 12:11:07,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:11:07,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 12:11:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-10-03 12:11:07,768 INFO L87 Difference]: Start difference. First operand 88 states and 201 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2021-10-03 12:11:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:11:08,172 INFO L93 Difference]: Finished difference Result 122 states and 251 transitions. [2021-10-03 12:11:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:11:08,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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 17 [2021-10-03 12:11:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:11:08,174 INFO L225 Difference]: With dead ends: 122 [2021-10-03 12:11:08,174 INFO L226 Difference]: Without dead ends: 104 [2021-10-03 12:11:08,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:11:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-03 12:11:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2021-10-03 12:11:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.2318840579710146) internal successors, (154), 69 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:11:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 154 transitions. [2021-10-03 12:11:08,177 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 154 transitions. Word has length 17 [2021-10-03 12:11:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:11:08,177 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 154 transitions. [2021-10-03 12:11:08,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2021-10-03 12:11:08,177 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 154 transitions. [2021-10-03 12:11:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-03 12:11:08,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:11:08,178 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:11:08,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-03 12:11:08,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:08,393 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:11:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:11:08,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2115566024, now seen corresponding path program 38 times [2021-10-03 12:11:08,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:11:08,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714961474] [2021-10-03 12:11:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:11:08,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:11:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:11:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:08,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:11:08,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714961474] [2021-10-03 12:11:08,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714961474] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:08,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035711156] [2021-10-03 12:11:08,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:11:08,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:08,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:11:08,526 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:11:08,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-03 12:11:09,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:11:09,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:11:09,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:11:09,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:11:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:09,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035711156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:09,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:11:09,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-03 12:11:09,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853367354] [2021-10-03 12:11:09,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:11:09,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:11:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:11:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:11:09,767 INFO L87 Difference]: Start difference. First operand 70 states and 154 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2021-10-03 12:11:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:11:10,126 INFO L93 Difference]: Finished difference Result 118 states and 241 transitions. [2021-10-03 12:11:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:11:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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 18 [2021-10-03 12:11:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:11:10,131 INFO L225 Difference]: With dead ends: 118 [2021-10-03 12:11:10,131 INFO L226 Difference]: Without dead ends: 78 [2021-10-03 12:11:10,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-10-03 12:11:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-03 12:11:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-10-03 12:11:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:11:10,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 139 transitions. [2021-10-03 12:11:10,137 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 139 transitions. Word has length 18 [2021-10-03 12:11:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:11:10,138 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 139 transitions. [2021-10-03 12:11:10,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2021-10-03 12:11:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 139 transitions. [2021-10-03 12:11:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-03 12:11:10,139 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:11:10,139 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:11:10,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-03 12:11:10,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:10,354 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:11:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:11:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash -400195548, now seen corresponding path program 39 times [2021-10-03 12:11:10,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:11:10,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710616054] [2021-10-03 12:11:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:11:10,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:11:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:11:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:10,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:11:10,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710616054] [2021-10-03 12:11:10,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710616054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:10,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350228500] [2021-10-03 12:11:10,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:11:10,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:10,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:11:10,506 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:11:10,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-03 12:11:11,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 12:11:11,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:11:11,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:11:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:11:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:11,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350228500] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:11,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:11:11,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-03 12:11:11,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586855438] [2021-10-03 12:11:11,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:11:11,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:11:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:11:11,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:11:11,707 INFO L87 Difference]: Start difference. First operand 72 states and 139 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2021-10-03 12:11:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:11:12,063 INFO L93 Difference]: Finished difference Result 102 states and 174 transitions. [2021-10-03 12:11:12,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-03 12:11:12,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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 18 [2021-10-03 12:11:12,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:11:12,065 INFO L225 Difference]: With dead ends: 102 [2021-10-03 12:11:12,065 INFO L226 Difference]: Without dead ends: 88 [2021-10-03 12:11:12,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:11:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-03 12:11:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-10-03 12:11:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 69 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:11:12,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 134 transitions. [2021-10-03 12:11:12,067 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 134 transitions. Word has length 18 [2021-10-03 12:11:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:11:12,068 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 134 transitions. [2021-10-03 12:11:12,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2021-10-03 12:11:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 134 transitions. [2021-10-03 12:11:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-03 12:11:12,068 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:11:12,069 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:11:12,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-10-03 12:11:12,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-03 12:11:12,270 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:11:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:11:12,270 INFO L82 PathProgramCache]: Analyzing trace with hash -344784288, now seen corresponding path program 40 times [2021-10-03 12:11:12,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:11:12,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463602744] [2021-10-03 12:11:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:11:12,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:11:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:11:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:12,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:11:12,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463602744] [2021-10-03 12:11:12,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463602744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:12,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345492030] [2021-10-03 12:11:12,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:11:12,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:12,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:11:12,407 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:11:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-03 12:11:13,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:11:13,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:11:13,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:11:13,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:11:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:13,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345492030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:13,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:11:13,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-03 12:11:13,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514143000] [2021-10-03 12:11:13,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:11:13,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:11:13,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:11:13,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:11:13,606 INFO L87 Difference]: Start difference. First operand 70 states and 134 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2021-10-03 12:11:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:11:13,964 INFO L93 Difference]: Finished difference Result 86 states and 154 transitions. [2021-10-03 12:11:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-03 12:11:13,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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 18 [2021-10-03 12:11:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:11:13,965 INFO L225 Difference]: With dead ends: 86 [2021-10-03 12:11:13,965 INFO L226 Difference]: Without dead ends: 36 [2021-10-03 12:11:13,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:11:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-03 12:11:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-03 12:11:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 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) [2021-10-03 12:11:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-10-03 12:11:13,967 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 18 [2021-10-03 12:11:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:11:13,967 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-10-03 12:11:13,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2021-10-03 12:11:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-10-03 12:11:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-03 12:11:13,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:11:13,968 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:11:13,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-10-03 12:11:14,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:14,169 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:11:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:11:14,170 INFO L82 PathProgramCache]: Analyzing trace with hash -230463878, now seen corresponding path program 41 times [2021-10-03 12:11:14,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:11:14,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601760812] [2021-10-03 12:11:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:11:14,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:11:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:11:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:14,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:11:14,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601760812] [2021-10-03 12:11:14,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601760812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:14,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044846314] [2021-10-03 12:11:14,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:11:14,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:11:14,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:11:14,338 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:11:14,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-03 12:11:15,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:11:15,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:11:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-03 12:11:15,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:11:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:11:15,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044846314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:11:15,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:11:15,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2021-10-03 12:11:15,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484159914] [2021-10-03 12:11:15,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:11:15,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:11:15,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:11:15,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:11:15,593 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:11:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:11:15,969 INFO L93 Difference]: Finished difference Result 48 states and 87 transitions. [2021-10-03 12:11:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:11:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-03 12:11:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:11:15,969 INFO L225 Difference]: With dead ends: 48 [2021-10-03 12:11:15,969 INFO L226 Difference]: Without dead ends: 0 [2021-10-03 12:11:15,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 534.2ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:11:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-03 12:11:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-03 12:11:15,970 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) [2021-10-03 12:11:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-03 12:11:15,970 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-10-03 12:11:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:11:15,970 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-03 12:11:15,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:11:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-03 12:11:15,971 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-03 12:11:15,973 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-03 12:11:15,974 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-03 12:11:15,974 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-03 12:11:16,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-10-03 12:11:16,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-10-03 12:11:16,195 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-03 12:11:16,195 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-03 12:11:16,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 12:11:16 BasicIcfg [2021-10-03 12:11:16,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-03 12:11:16,198 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-03 12:11:16,198 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-03 12:11:16,198 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-03 12:11:16,199 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:09:45" (3/4) ... [2021-10-03 12:11:16,201 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-03 12:11:16,209 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-03 12:11:16,209 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-03 12:11:16,214 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-03 12:11:16,214 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 12:11:16,214 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 12:11:16,259 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-03 12:11:16,259 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-03 12:11:16,262 INFO L168 Benchmark]: Toolchain (without parser) took 91885.55 ms. Allocated memory was 48.2 MB in the beginning and 383.8 MB in the end (delta: 335.5 MB). Free memory was 24.7 MB in the beginning and 162.8 MB in the end (delta: -138.1 MB). Peak memory consumption was 201.4 MB. Max. memory is 16.1 GB. [2021-10-03 12:11:16,264 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 48.2 MB. Free memory was 34.0 MB in the beginning and 33.9 MB in the end (delta: 41.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:11:16,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.49 ms. Allocated memory is still 48.2 MB. Free memory was 24.4 MB in the beginning and 25.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-03 12:11:16,266 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.04 ms. Allocated memory is still 48.2 MB. Free memory was 25.9 MB in the beginning and 24.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 12:11:16,266 INFO L168 Benchmark]: Boogie Preprocessor took 67.00 ms. Allocated memory is still 48.2 MB. Free memory was 24.4 MB in the beginning and 23.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:11:16,267 INFO L168 Benchmark]: RCFGBuilder took 654.73 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 23.1 MB in the beginning and 34.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-03 12:11:16,267 INFO L168 Benchmark]: TraceAbstraction took 90741.54 ms. Allocated memory was 58.7 MB in the beginning and 383.8 MB in the end (delta: 325.1 MB). Free memory was 33.9 MB in the beginning and 165.9 MB in the end (delta: -132.0 MB). Peak memory consumption was 192.4 MB. Max. memory is 16.1 GB. [2021-10-03 12:11:16,268 INFO L168 Benchmark]: Witness Printer took 61.80 ms. Allocated memory is still 383.8 MB. Free memory was 164.9 MB in the beginning and 162.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-03 12:11:16,270 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 48.2 MB. Free memory was 34.0 MB in the beginning and 33.9 MB in the end (delta: 41.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.49 ms. Allocated memory is still 48.2 MB. Free memory was 24.4 MB in the beginning and 25.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.04 ms. Allocated memory is still 48.2 MB. Free memory was 25.9 MB in the beginning and 24.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.00 ms. Allocated memory is still 48.2 MB. Free memory was 24.4 MB in the beginning and 23.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 654.73 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 23.1 MB in the beginning and 34.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 90741.54 ms. Allocated memory was 58.7 MB in the beginning and 383.8 MB in the end (delta: 325.1 MB). Free memory was 33.9 MB in the beginning and 165.9 MB in the end (delta: -132.0 MB). Peak memory consumption was 192.4 MB. Max. memory is 16.1 GB. * Witness Printer took 61.80 ms. Allocated memory is still 383.8 MB. Free memory was 164.9 MB in the beginning and 162.8 MB in the end (delta: 2.1 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: 2224.3ms, 73 PlacesBefore, 23 PlacesAfterwards, 72 TransitionsBefore, 18 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 5 FixpointIterations, 34 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 61 TotalNumberOfCompositions, 436 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 427, positive: 425, positive conditional: 0, positive unconditional: 425, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 283, positive: 281, positive conditional: 0, positive unconditional: 281, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 283, positive: 279, positive conditional: 0, positive unconditional: 279, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 17, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 427, positive: 144, positive conditional: 0, positive unconditional: 144, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 283, unknown conditional: 0, unknown unconditional: 283] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - 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: 51]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 85 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 90530.1ms, OverallIterations: 67, TraceHistogramMax: 3, EmptinessCheckTime: 67.6ms, AutomataDifference: 18984.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2300.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2005 SDtfs, 4793 SDslu, 10822 SDs, 0 SdLazy, 10513 SolverSat, 579 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6356.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1853 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 1344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7475 ImplicationChecksByTransitivity, 20132.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=59, InterpolantAutomatonStates: 902, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 352.9ms AutomataMinimizationTime, 67 MinimizatonAttempts, 1898 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 398.9ms SsaConstructionTime, 1804.4ms SatisfiabilityAnalysisTime, 24714.9ms InterpolantComputationTime, 1976 NumberOfCodeBlocks, 1976 NumberOfCodeBlocksAsserted, 187 NumberOfCheckSat, 1849 ConstructedInterpolants, 0 QuantifiedInterpolants, 20811 SizeOfPredicates, 170 NumberOfNonLiveVariables, 5470 ConjunctsInSsa, 1518 ConjunctsInUnsatCore, 127 InterpolantComputations, 7 PerfectInterpolantSequences, 1/455 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! [2021-10-03 12:11:16,342 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...