./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0504.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0504.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cddde357ab55a506b6049f3b60959cd723bf2cbfd36f7774fe3606d53024bbf3 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:04:00,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:04:00,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:04:00,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:04:00,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:04:00,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:04:00,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:04:00,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:04:00,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:04:00,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:04:00,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:04:00,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:04:00,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:04:00,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:04:00,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:04:00,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:04:00,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:04:00,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:04:00,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:04:00,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:04:00,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:04:00,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:04:00,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:04:00,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:04:00,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:04:00,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:04:00,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:04:00,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:04:00,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:04:00,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:04:00,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:04:00,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:04:00,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:04:00,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:04:00,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:04:00,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:04:00,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:04:00,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:04:00,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:04:00,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:04:00,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:04:00,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 00:04:00,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:04:00,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:04:00,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:04:00,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:04:00,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:04:00,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:04:00,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:04:00,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:04:00,745 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:04:00,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:04:00,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:04:00,746 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:04:00,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:04:00,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:04:00,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:04:00,746 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:04:00,746 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:04:00,747 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:04:00,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:04:00,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:04:00,747 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:04:00,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:04:00,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:04:00,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:04:00,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:04:00,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:04:00,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:04:00,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:04:00,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:04:00,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:04:00,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:04:00,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cddde357ab55a506b6049f3b60959cd723bf2cbfd36f7774fe3606d53024bbf3 [2021-12-22 00:04:00,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:04:00,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:04:00,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:04:00,962 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:04:00,962 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:04:00,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0504.i [2021-12-22 00:04:01,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2432b125e/2721bd66ec194b4b8d385c3e771d08cd/FLAG79adbe25c [2021-12-22 00:04:01,398 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:04:01,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0504.i [2021-12-22 00:04:01,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2432b125e/2721bd66ec194b4b8d385c3e771d08cd/FLAG79adbe25c [2021-12-22 00:04:01,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2432b125e/2721bd66ec194b4b8d385c3e771d08cd [2021-12-22 00:04:01,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:04:01,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:04:01,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:04:01,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:04:01,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:04:01,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f19d368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01, skipping insertion in model container [2021-12-22 00:04:01,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:04:01,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:04:01,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:04:01,655 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:04:01,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:04:01,721 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:04:01,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01 WrapperNode [2021-12-22 00:04:01,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:04:01,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:04:01,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:04:01,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:04:01,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,774 INFO L137 Inliner]: procedures = 123, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2021-12-22 00:04:01,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:04:01,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:04:01,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:04:01,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:04:01,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:04:01,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:04:01,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:04:01,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:04:01,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (1/1) ... [2021-12-22 00:04:01,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:04:01,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:01,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 00:04:01,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 00:04:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 00:04:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:04:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 00:04:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 00:04:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 00:04:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:04:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 00:04:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:04:01,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:04:01,934 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:04:01,936 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:04:02,143 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:04:02,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:04:02,151 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 00:04:02,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:04:02 BoogieIcfgContainer [2021-12-22 00:04:02,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:04:02,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:04:02,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:04:02,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:04:02,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:04:01" (1/3) ... [2021-12-22 00:04:02,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571db8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:04:02, skipping insertion in model container [2021-12-22 00:04:02,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:01" (2/3) ... [2021-12-22 00:04:02,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571db8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:04:02, skipping insertion in model container [2021-12-22 00:04:02,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:04:02" (3/3) ... [2021-12-22 00:04:02,158 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0504.i [2021-12-22 00:04:02,162 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:04:02,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-12-22 00:04:02,193 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:04:02,198 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-22 00:04:02,199 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-12-22 00:04:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-22 00:04:02,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:02,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-22 00:04:02,213 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:02,217 INFO L85 PathProgramCache]: Analyzing trace with hash 28780379, now seen corresponding path program 1 times [2021-12-22 00:04:02,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:02,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073507967] [2021-12-22 00:04:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:02,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:02,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:02,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073507967] [2021-12-22 00:04:02,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073507967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:02,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:02,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:02,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659137644] [2021-12-22 00:04:02,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:02,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 00:04:02,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:02,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 00:04:02,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 00:04:02,343 INFO L87 Difference]: Start difference. First operand has 87 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:02,361 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-12-22 00:04:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 00:04:02,362 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-12-22 00:04:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:02,368 INFO L225 Difference]: With dead ends: 87 [2021-12-22 00:04:02,369 INFO L226 Difference]: Without dead ends: 85 [2021-12-22 00:04:02,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 00:04:02,373 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:02,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:02,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-22 00:04:02,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-22 00:04:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 44 states have (on average 2.022727272727273) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-12-22 00:04:02,404 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 5 [2021-12-22 00:04:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:02,404 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-12-22 00:04:02,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-12-22 00:04:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 00:04:02,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:02,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 00:04:02,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 00:04:02,405 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:02,407 INFO L85 PathProgramCache]: Analyzing trace with hash 889572104, now seen corresponding path program 1 times [2021-12-22 00:04:02,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:02,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157385907] [2021-12-22 00:04:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:02,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:02,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:02,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157385907] [2021-12-22 00:04:02,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157385907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:02,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:02,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:04:02,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047353024] [2021-12-22 00:04:02,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:02,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:04:02,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:02,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:04:02,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:02,483 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:02,520 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2021-12-22 00:04:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:04:02,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 00:04:02,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:02,522 INFO L225 Difference]: With dead ends: 133 [2021-12-22 00:04:02,523 INFO L226 Difference]: Without dead ends: 133 [2021-12-22 00:04:02,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:02,526 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:02,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 165 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-22 00:04:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 109. [2021-12-22 00:04:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 108 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) [2021-12-22 00:04:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2021-12-22 00:04:02,539 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 6 [2021-12-22 00:04:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:02,540 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2021-12-22 00:04:02,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2021-12-22 00:04:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 00:04:02,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:02,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 00:04:02,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 00:04:02,544 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:02,545 INFO L85 PathProgramCache]: Analyzing trace with hash 889571339, now seen corresponding path program 1 times [2021-12-22 00:04:02,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:02,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803034695] [2021-12-22 00:04:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:02,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:02,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803034695] [2021-12-22 00:04:02,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803034695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:02,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:02,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:02,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322741786] [2021-12-22 00:04:02,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:02,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:04:02,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:04:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:02,594 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:02,681 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2021-12-22 00:04:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:04:02,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 00:04:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:02,683 INFO L225 Difference]: With dead ends: 130 [2021-12-22 00:04:02,683 INFO L226 Difference]: Without dead ends: 130 [2021-12-22 00:04:02,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:02,684 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 74 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:02,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 64 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-22 00:04:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 101. [2021-12-22 00:04:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.8235294117647058) internal successors, (124), 100 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) [2021-12-22 00:04:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2021-12-22 00:04:02,689 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 6 [2021-12-22 00:04:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:02,690 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2021-12-22 00:04:02,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,690 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2021-12-22 00:04:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 00:04:02,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:02,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 00:04:02,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 00:04:02,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:02,691 INFO L85 PathProgramCache]: Analyzing trace with hash 889571340, now seen corresponding path program 1 times [2021-12-22 00:04:02,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:02,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217219700] [2021-12-22 00:04:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:02,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:02,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217219700] [2021-12-22 00:04:02,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217219700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:02,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:02,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:02,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209232944] [2021-12-22 00:04:02,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:02,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:04:02,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:04:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:02,718 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:02,768 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-12-22 00:04:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:04:02,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 00:04:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:02,769 INFO L225 Difference]: With dead ends: 138 [2021-12-22 00:04:02,769 INFO L226 Difference]: Without dead ends: 138 [2021-12-22 00:04:02,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:02,770 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:02,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 102 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-22 00:04:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2021-12-22 00:04:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2021-12-22 00:04:02,775 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 6 [2021-12-22 00:04:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:02,775 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2021-12-22 00:04:02,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2021-12-22 00:04:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:04:02,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:02,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:02,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 00:04:02,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1806930847, now seen corresponding path program 1 times [2021-12-22 00:04:02,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:02,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86599169] [2021-12-22 00:04:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:02,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:02,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86599169] [2021-12-22 00:04:02,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86599169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:02,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:02,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:02,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602972822] [2021-12-22 00:04:02,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:02,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:04:02,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:02,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:04:02,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:02,793 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:02,833 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2021-12-22 00:04:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:04:02,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-22 00:04:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:02,835 INFO L225 Difference]: With dead ends: 103 [2021-12-22 00:04:02,835 INFO L226 Difference]: Without dead ends: 100 [2021-12-22 00:04:02,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:02,836 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:02,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-22 00:04:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-12-22 00:04:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 99 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) [2021-12-22 00:04:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-12-22 00:04:02,841 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 7 [2021-12-22 00:04:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:02,841 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-12-22 00:04:02,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-12-22 00:04:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 00:04:02,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:02,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:02,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 00:04:02,842 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1857997403, now seen corresponding path program 1 times [2021-12-22 00:04:02,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:02,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713410466] [2021-12-22 00:04:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:02,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:02,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:02,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713410466] [2021-12-22 00:04:02,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713410466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:02,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:02,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:04:02,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770292347] [2021-12-22 00:04:02,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:02,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:04:02,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:02,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:04:02,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:02,924 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:03,005 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2021-12-22 00:04:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:04:03,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-22 00:04:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:03,006 INFO L225 Difference]: With dead ends: 126 [2021-12-22 00:04:03,006 INFO L226 Difference]: Without dead ends: 126 [2021-12-22 00:04:03,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:04:03,007 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 117 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:03,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 69 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-22 00:04:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 92. [2021-12-22 00:04:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 91 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2021-12-22 00:04:03,011 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 15 [2021-12-22 00:04:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:03,011 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2021-12-22 00:04:03,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2021-12-22 00:04:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 00:04:03,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:03,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:03,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 00:04:03,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:03,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:03,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1763344638, now seen corresponding path program 1 times [2021-12-22 00:04:03,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:03,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704211055] [2021-12-22 00:04:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:03,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:03,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:03,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704211055] [2021-12-22 00:04:03,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704211055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:03,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:03,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:03,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313239877] [2021-12-22 00:04:03,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:03,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:04:03,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:03,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:04:03,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:03,048 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:03,081 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2021-12-22 00:04:03,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:04:03,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-12-22 00:04:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:03,082 INFO L225 Difference]: With dead ends: 88 [2021-12-22 00:04:03,082 INFO L226 Difference]: Without dead ends: 88 [2021-12-22 00:04:03,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:03,083 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 14 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:03,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 84 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-22 00:04:03,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-12-22 00:04:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 87 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2021-12-22 00:04:03,086 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 16 [2021-12-22 00:04:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:03,086 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2021-12-22 00:04:03,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2021-12-22 00:04:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 00:04:03,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:03,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:03,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 00:04:03,087 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1763344639, now seen corresponding path program 1 times [2021-12-22 00:04:03,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:03,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21260129] [2021-12-22 00:04:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:03,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:03,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:03,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21260129] [2021-12-22 00:04:03,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21260129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:03,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:03,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:03,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978230018] [2021-12-22 00:04:03,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:03,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:04:03,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:04:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:03,123 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:03,151 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-12-22 00:04:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:04:03,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-12-22 00:04:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:03,153 INFO L225 Difference]: With dead ends: 84 [2021-12-22 00:04:03,153 INFO L226 Difference]: Without dead ends: 84 [2021-12-22 00:04:03,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:03,153 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:03,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-22 00:04:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-22 00:04:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 83 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2021-12-22 00:04:03,156 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 16 [2021-12-22 00:04:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:03,156 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2021-12-22 00:04:03,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2021-12-22 00:04:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 00:04:03,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:03,157 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:03,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 00:04:03,157 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:03,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:03,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1967864768, now seen corresponding path program 1 times [2021-12-22 00:04:03,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:03,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956372254] [2021-12-22 00:04:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:03,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:03,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:03,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956372254] [2021-12-22 00:04:03,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956372254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:03,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:03,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:04:03,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956767818] [2021-12-22 00:04:03,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:03,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:04:03,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:03,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:04:03,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:04:03,225 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:03,299 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2021-12-22 00:04:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:04:03,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-22 00:04:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:03,300 INFO L225 Difference]: With dead ends: 114 [2021-12-22 00:04:03,302 INFO L226 Difference]: Without dead ends: 114 [2021-12-22 00:04:03,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:03,304 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 83 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:03,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 84 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-22 00:04:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2021-12-22 00:04:03,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 85 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-12-22 00:04:03,310 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 18 [2021-12-22 00:04:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:03,311 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-12-22 00:04:03,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-12-22 00:04:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 00:04:03,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:03,312 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:03,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 00:04:03,312 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:03,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1967864767, now seen corresponding path program 1 times [2021-12-22 00:04:03,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:03,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565067444] [2021-12-22 00:04:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:03,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:03,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:03,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565067444] [2021-12-22 00:04:03,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565067444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:03,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:03,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:04:03,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708973726] [2021-12-22 00:04:03,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:03,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:04:03,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:03,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:04:03,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:04:03,392 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:03,482 INFO L93 Difference]: Finished difference Result 153 states and 172 transitions. [2021-12-22 00:04:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:04:03,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-22 00:04:03,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:03,483 INFO L225 Difference]: With dead ends: 153 [2021-12-22 00:04:03,483 INFO L226 Difference]: Without dead ends: 153 [2021-12-22 00:04:03,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:03,484 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 72 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:03,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 118 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-22 00:04:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 109. [2021-12-22 00:04:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 92 states have (on average 1.3804347826086956) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-22 00:04:03,488 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 18 [2021-12-22 00:04:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:03,489 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-22 00:04:03,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-22 00:04:03,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 00:04:03,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:03,490 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:03,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 00:04:03,490 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:03,491 INFO L85 PathProgramCache]: Analyzing trace with hash -874266265, now seen corresponding path program 1 times [2021-12-22 00:04:03,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:03,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355700431] [2021-12-22 00:04:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:03,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:03,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:03,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355700431] [2021-12-22 00:04:03,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355700431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:03,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:03,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:04:03,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906134870] [2021-12-22 00:04:03,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:03,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:04:03,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:03,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:04:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:04:03,540 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:03,577 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2021-12-22 00:04:03,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:04:03,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 00:04:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:03,578 INFO L225 Difference]: With dead ends: 113 [2021-12-22 00:04:03,578 INFO L226 Difference]: Without dead ends: 113 [2021-12-22 00:04:03,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:03,579 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 89 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:03,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 108 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-22 00:04:03,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2021-12-22 00:04:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 105 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-12-22 00:04:03,585 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 19 [2021-12-22 00:04:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:03,586 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-12-22 00:04:03,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-12-22 00:04:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 00:04:03,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:03,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:03,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 00:04:03,588 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:03,589 INFO L85 PathProgramCache]: Analyzing trace with hash 55140128, now seen corresponding path program 1 times [2021-12-22 00:04:03,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:03,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469350343] [2021-12-22 00:04:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:03,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:03,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:03,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469350343] [2021-12-22 00:04:03,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469350343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:03,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:03,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:04:03,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076834794] [2021-12-22 00:04:03,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:03,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:04:03,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:04:03,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:04:03,670 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:03,770 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2021-12-22 00:04:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:04:03,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 00:04:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:03,771 INFO L225 Difference]: With dead ends: 170 [2021-12-22 00:04:03,772 INFO L226 Difference]: Without dead ends: 170 [2021-12-22 00:04:03,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:04:03,773 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:03,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 183 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-22 00:04:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 120. [2021-12-22 00:04:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 119 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2021-12-22 00:04:03,775 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 19 [2021-12-22 00:04:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:03,775 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2021-12-22 00:04:03,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2021-12-22 00:04:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 00:04:03,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:03,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:03,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 00:04:03,778 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash 55140129, now seen corresponding path program 1 times [2021-12-22 00:04:03,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:03,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627416331] [2021-12-22 00:04:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:03,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:03,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:03,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627416331] [2021-12-22 00:04:03,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627416331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:03,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:03,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 00:04:03,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560677587] [2021-12-22 00:04:03,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:03,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:04:03,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:03,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:04:03,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:04:03,920 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:04,169 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2021-12-22 00:04:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:04:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 00:04:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:04,170 INFO L225 Difference]: With dead ends: 184 [2021-12-22 00:04:04,170 INFO L226 Difference]: Without dead ends: 184 [2021-12-22 00:04:04,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-12-22 00:04:04,171 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 162 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:04,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 195 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:04:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-22 00:04:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2021-12-22 00:04:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 103 states have (on average 1.2912621359223302) internal successors, (133), 119 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2021-12-22 00:04:04,173 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 19 [2021-12-22 00:04:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:04,173 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2021-12-22 00:04:04,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2021-12-22 00:04:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:04:04,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:04,174 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:04,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 00:04:04,174 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1332429407, now seen corresponding path program 1 times [2021-12-22 00:04:04,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:04,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882421505] [2021-12-22 00:04:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:04,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:04:04,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:04,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882421505] [2021-12-22 00:04:04,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882421505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:04,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:04,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:04:04,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890786769] [2021-12-22 00:04:04,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:04,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:04:04,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:04,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:04:04,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:04:04,201 INFO L87 Difference]: Start difference. First operand 120 states and 133 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:04,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:04,258 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2021-12-22 00:04:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:04:04,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-22 00:04:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:04,259 INFO L225 Difference]: With dead ends: 135 [2021-12-22 00:04:04,259 INFO L226 Difference]: Without dead ends: 135 [2021-12-22 00:04:04,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:04,260 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:04,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 98 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:04,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-22 00:04:04,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2021-12-22 00:04:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 107 states have (on average 1.2990654205607477) internal successors, (139), 122 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) [2021-12-22 00:04:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2021-12-22 00:04:04,264 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 20 [2021-12-22 00:04:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:04,265 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2021-12-22 00:04:04,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2021-12-22 00:04:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:04:04,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:04,266 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:04,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 00:04:04,267 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:04,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:04,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1332429406, now seen corresponding path program 1 times [2021-12-22 00:04:04,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:04,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43316289] [2021-12-22 00:04:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:04,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:04,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:04,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43316289] [2021-12-22 00:04:04,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43316289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:04,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:04,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:04:04,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763763022] [2021-12-22 00:04:04,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:04,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:04:04,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:04,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:04:04,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:04,315 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:04,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:04,445 INFO L93 Difference]: Finished difference Result 194 states and 217 transitions. [2021-12-22 00:04:04,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:04:04,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-22 00:04:04,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:04,446 INFO L225 Difference]: With dead ends: 194 [2021-12-22 00:04:04,446 INFO L226 Difference]: Without dead ends: 194 [2021-12-22 00:04:04,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:04,448 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:04,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 132 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-22 00:04:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 135. [2021-12-22 00:04:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.3277310924369747) internal successors, (158), 134 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2021-12-22 00:04:04,450 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 20 [2021-12-22 00:04:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:04,451 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2021-12-22 00:04:04,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2021-12-22 00:04:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 00:04:04,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:04,451 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:04,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 00:04:04,451 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:04,452 INFO L85 PathProgramCache]: Analyzing trace with hash -316635569, now seen corresponding path program 1 times [2021-12-22 00:04:04,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:04,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125198377] [2021-12-22 00:04:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:04,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:04,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:04,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125198377] [2021-12-22 00:04:04,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125198377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:04,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:04,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:04:04,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219971954] [2021-12-22 00:04:04,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:04,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:04:04,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:04,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:04:04,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:04,511 INFO L87 Difference]: Start difference. First operand 135 states and 158 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 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) [2021-12-22 00:04:04,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:04,680 INFO L93 Difference]: Finished difference Result 200 states and 231 transitions. [2021-12-22 00:04:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 00:04:04,680 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-22 00:04:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:04,683 INFO L225 Difference]: With dead ends: 200 [2021-12-22 00:04:04,683 INFO L226 Difference]: Without dead ends: 200 [2021-12-22 00:04:04,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:04:04,684 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 83 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:04,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 225 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-22 00:04:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2021-12-22 00:04:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 128 states have (on average 1.328125) internal successors, (170), 143 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2021-12-22 00:04:04,690 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 23 [2021-12-22 00:04:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:04,690 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2021-12-22 00:04:04,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 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) [2021-12-22 00:04:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2021-12-22 00:04:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 00:04:04,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:04,692 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:04,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 00:04:04,693 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash -316635568, now seen corresponding path program 1 times [2021-12-22 00:04:04,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:04,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606380513] [2021-12-22 00:04:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:04,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:04,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606380513] [2021-12-22 00:04:04,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606380513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:04,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:04,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:04:04,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096227221] [2021-12-22 00:04:04,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:04,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:04:04,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:04:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:04:04,780 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) [2021-12-22 00:04:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:04,931 INFO L93 Difference]: Finished difference Result 195 states and 225 transitions. [2021-12-22 00:04:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:04:04,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-22 00:04:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:04,932 INFO L225 Difference]: With dead ends: 195 [2021-12-22 00:04:04,932 INFO L226 Difference]: Without dead ends: 195 [2021-12-22 00:04:04,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:04:04,933 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 93 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:04,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 236 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-22 00:04:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2021-12-22 00:04:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 127 states have (on average 1.31496062992126) internal successors, (167), 142 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 167 transitions. [2021-12-22 00:04:04,935 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 167 transitions. Word has length 23 [2021-12-22 00:04:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:04,936 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 167 transitions. [2021-12-22 00:04:04,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) [2021-12-22 00:04:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 167 transitions. [2021-12-22 00:04:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 00:04:04,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:04,936 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:04,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 00:04:04,936 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:04,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1225769432, now seen corresponding path program 1 times [2021-12-22 00:04:04,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:04,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193194056] [2021-12-22 00:04:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:04,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:04,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:04,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193194056] [2021-12-22 00:04:04,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193194056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:04,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:04,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:04:04,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559590362] [2021-12-22 00:04:04,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:04,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:04:04,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:04,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:04:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:04,962 INFO L87 Difference]: Start difference. First operand 143 states and 167 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:05,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:05,034 INFO L93 Difference]: Finished difference Result 167 states and 191 transitions. [2021-12-22 00:04:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:04:05,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-22 00:04:05,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:05,035 INFO L225 Difference]: With dead ends: 167 [2021-12-22 00:04:05,035 INFO L226 Difference]: Without dead ends: 167 [2021-12-22 00:04:05,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:05,036 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 112 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:05,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 148 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-22 00:04:05,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2021-12-22 00:04:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 141 states have (on average 1.3546099290780143) internal successors, (191), 156 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2021-12-22 00:04:05,038 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 24 [2021-12-22 00:04:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:05,039 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2021-12-22 00:04:05,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2021-12-22 00:04:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 00:04:05,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:05,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:05,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 00:04:05,039 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:05,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1085033438, now seen corresponding path program 1 times [2021-12-22 00:04:05,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:05,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120661296] [2021-12-22 00:04:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:05,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:05,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:05,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120661296] [2021-12-22 00:04:05,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120661296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:05,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735641931] [2021-12-22 00:04:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:05,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:05,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:05,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 00:04:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:05,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-22 00:04:05,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:05,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 00:04:05,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 00:04:05,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:05,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:05,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:05,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:05,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:05,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:05,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:05,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:05,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:05,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:05,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:05,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:05,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:05,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 00:04:05,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 00:04:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:05,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:05,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735641931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:05,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:05,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 9 [2021-12-22 00:04:05,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46268499] [2021-12-22 00:04:05,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:05,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:04:05,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:05,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:04:05,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:04:05,651 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:05,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:05,809 INFO L93 Difference]: Finished difference Result 186 states and 218 transitions. [2021-12-22 00:04:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:04:05,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-22 00:04:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:05,811 INFO L225 Difference]: With dead ends: 186 [2021-12-22 00:04:05,811 INFO L226 Difference]: Without dead ends: 186 [2021-12-22 00:04:05,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:04:05,811 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 199 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:05,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 267 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-22 00:04:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-12-22 00:04:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 145 states have (on average 1.3448275862068966) internal successors, (195), 160 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) [2021-12-22 00:04:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2021-12-22 00:04:05,815 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 27 [2021-12-22 00:04:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:05,815 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2021-12-22 00:04:05,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2021-12-22 00:04:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 00:04:05,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:05,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-22 00:04:05,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:06,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:06,021 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:06,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2078846143, now seen corresponding path program 1 times [2021-12-22 00:04:06,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:06,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923215848] [2021-12-22 00:04:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:06,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:06,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:06,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923215848] [2021-12-22 00:04:06,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923215848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:06,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54701298] [2021-12-22 00:04:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:06,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:06,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:06,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:06,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 00:04:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:06,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 00:04:06,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:06,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:06,197 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 00:04:06,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 00:04:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:06,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:06,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54701298] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:06,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:06,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2021-12-22 00:04:06,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905960700] [2021-12-22 00:04:06,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:06,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:04:06,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:04:06,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:04:06,325 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:06,393 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2021-12-22 00:04:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:04:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-22 00:04:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:06,394 INFO L225 Difference]: With dead ends: 181 [2021-12-22 00:04:06,394 INFO L226 Difference]: Without dead ends: 181 [2021-12-22 00:04:06,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:06,395 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 137 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:06,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 141 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-12-22 00:04:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-22 00:04:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 160. [2021-12-22 00:04:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 145 states have (on average 1.3310344827586207) internal successors, (193), 159 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 193 transitions. [2021-12-22 00:04:06,397 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 193 transitions. Word has length 27 [2021-12-22 00:04:06,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:06,397 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 193 transitions. [2021-12-22 00:04:06,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:06,398 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 193 transitions. [2021-12-22 00:04:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 00:04:06,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:06,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-22 00:04:06,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:06,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-22 00:04:06,614 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:06,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2078846144, now seen corresponding path program 1 times [2021-12-22 00:04:06,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:06,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836613508] [2021-12-22 00:04:06,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:06,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:06,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:06,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836613508] [2021-12-22 00:04:06,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836613508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:06,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922801155] [2021-12-22 00:04:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:06,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:06,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:06,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:06,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 00:04:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:06,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 00:04:06,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:06,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:06,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:06,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:06,904 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:06,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 00:04:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:06,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:07,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-12-22 00:04:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:07,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922801155] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:07,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:07,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2021-12-22 00:04:07,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56702773] [2021-12-22 00:04:07,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:07,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 00:04:07,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:07,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 00:04:07,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:04:07,274 INFO L87 Difference]: Start difference. First operand 160 states and 193 transitions. Second operand has 15 states, 14 states have (on average 5.357142857142857) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:07,394 INFO L93 Difference]: Finished difference Result 180 states and 212 transitions. [2021-12-22 00:04:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:04:07,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.357142857142857) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-22 00:04:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:07,396 INFO L225 Difference]: With dead ends: 180 [2021-12-22 00:04:07,396 INFO L226 Difference]: Without dead ends: 180 [2021-12-22 00:04:07,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-12-22 00:04:07,396 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 316 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:07,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 198 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 155 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2021-12-22 00:04:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-22 00:04:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 159. [2021-12-22 00:04:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 145 states have (on average 1.3172413793103448) internal successors, (191), 158 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 191 transitions. [2021-12-22 00:04:07,400 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 191 transitions. Word has length 27 [2021-12-22 00:04:07,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:07,400 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 191 transitions. [2021-12-22 00:04:07,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.357142857142857) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 191 transitions. [2021-12-22 00:04:07,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 00:04:07,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:07,401 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:07,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:07,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:07,617 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash 723701189, now seen corresponding path program 1 times [2021-12-22 00:04:07,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:07,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297157845] [2021-12-22 00:04:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:07,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:07,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:07,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297157845] [2021-12-22 00:04:07,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297157845] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:07,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219171459] [2021-12-22 00:04:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:07,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:07,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:07,667 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:07,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 00:04:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:07,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 00:04:07,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:07,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 00:04:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:07,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:07,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219171459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:07,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:07,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2021-12-22 00:04:07,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223136639] [2021-12-22 00:04:07,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:07,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:04:07,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:07,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:04:07,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:07,877 INFO L87 Difference]: Start difference. First operand 159 states and 191 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:07,967 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2021-12-22 00:04:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:04:07,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-22 00:04:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:07,969 INFO L225 Difference]: With dead ends: 161 [2021-12-22 00:04:07,969 INFO L226 Difference]: Without dead ends: 149 [2021-12-22 00:04:07,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:04:07,970 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:07,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 162 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-22 00:04:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-22 00:04:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-12-22 00:04:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 135 states have (on average 1.3333333333333333) internal successors, (180), 148 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 180 transitions. [2021-12-22 00:04:07,972 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 180 transitions. Word has length 28 [2021-12-22 00:04:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:07,972 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 180 transitions. [2021-12-22 00:04:07,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 180 transitions. [2021-12-22 00:04:07,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 00:04:07,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:07,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:07,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:08,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:08,190 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:08,190 INFO L85 PathProgramCache]: Analyzing trace with hash -28804244, now seen corresponding path program 1 times [2021-12-22 00:04:08,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:08,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107803892] [2021-12-22 00:04:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:08,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:08,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107803892] [2021-12-22 00:04:08,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107803892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500134306] [2021-12-22 00:04:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:08,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:08,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:08,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 00:04:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:08,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 00:04:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:08,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:08,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:08,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:08,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:08,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:08,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:08,569 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:04:08,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-22 00:04:08,583 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:08,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 00:04:08,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-12-22 00:04:08,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 00:04:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:08,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:08,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-12-22 00:04:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:08,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500134306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:08,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:08,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 5] total 17 [2021-12-22 00:04:08,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092051933] [2021-12-22 00:04:08,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:08,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 00:04:08,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:08,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 00:04:08,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-12-22 00:04:08,962 INFO L87 Difference]: Start difference. First operand 149 states and 180 transitions. Second operand has 18 states, 17 states have (on average 4.235294117647059) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:09,181 INFO L93 Difference]: Finished difference Result 238 states and 289 transitions. [2021-12-22 00:04:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 00:04:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.235294117647059) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-22 00:04:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:09,182 INFO L225 Difference]: With dead ends: 238 [2021-12-22 00:04:09,182 INFO L226 Difference]: Without dead ends: 238 [2021-12-22 00:04:09,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-12-22 00:04:09,183 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 106 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:09,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 253 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 256 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2021-12-22 00:04:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-22 00:04:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 174. [2021-12-22 00:04:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 160 states have (on average 1.3) internal successors, (208), 173 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) [2021-12-22 00:04:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2021-12-22 00:04:09,186 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 31 [2021-12-22 00:04:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:09,186 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2021-12-22 00:04:09,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.235294117647059) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2021-12-22 00:04:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 00:04:09,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:09,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:09,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:09,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-22 00:04:09,395 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash 36474197, now seen corresponding path program 1 times [2021-12-22 00:04:09,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:09,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714576681] [2021-12-22 00:04:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:09,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:09,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:09,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714576681] [2021-12-22 00:04:09,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714576681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:09,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563963387] [2021-12-22 00:04:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:09,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:09,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:09,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 00:04:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:09,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 00:04:09,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:09,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:09,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:09,603 INFO L353 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-22 00:04:09,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-12-22 00:04:09,644 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-22 00:04:09,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-12-22 00:04:09,672 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:04:09,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-12-22 00:04:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:09,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:09,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563963387] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:09,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:09,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 00:04:09,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435872481] [2021-12-22 00:04:09,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:09,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 00:04:09,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 00:04:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:04:09,811 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:09,929 INFO L93 Difference]: Finished difference Result 192 states and 227 transitions. [2021-12-22 00:04:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:04:09,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-22 00:04:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:09,930 INFO L225 Difference]: With dead ends: 192 [2021-12-22 00:04:09,930 INFO L226 Difference]: Without dead ends: 192 [2021-12-22 00:04:09,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-12-22 00:04:09,931 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 65 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:09,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 303 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 208 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2021-12-22 00:04:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-22 00:04:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2021-12-22 00:04:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 160 states have (on average 1.2875) internal successors, (206), 172 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2021-12-22 00:04:09,934 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 32 [2021-12-22 00:04:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:09,934 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2021-12-22 00:04:09,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2021-12-22 00:04:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 00:04:09,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:09,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:09,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:10,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:10,135 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash 36474198, now seen corresponding path program 1 times [2021-12-22 00:04:10,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:10,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483252085] [2021-12-22 00:04:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:10,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:10,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:10,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483252085] [2021-12-22 00:04:10,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483252085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:10,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576491373] [2021-12-22 00:04:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:10,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:10,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:10,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:10,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 00:04:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-22 00:04:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:10,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:10,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:10,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:10,451 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-22 00:04:10,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 00:04:10,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-22 00:04:10,511 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-22 00:04:10,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2021-12-22 00:04:10,522 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-22 00:04:10,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2021-12-22 00:04:10,575 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:04:10,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-12-22 00:04:10,579 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:04:10,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-12-22 00:04:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:10,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:10,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-12-22 00:04:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:10,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576491373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:10,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:10,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2021-12-22 00:04:10,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193981781] [2021-12-22 00:04:10,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:10,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 00:04:10,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:10,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 00:04:10,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-22 00:04:10,918 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:11,197 INFO L93 Difference]: Finished difference Result 243 states and 289 transitions. [2021-12-22 00:04:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:04:11,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-22 00:04:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:11,198 INFO L225 Difference]: With dead ends: 243 [2021-12-22 00:04:11,198 INFO L226 Difference]: Without dead ends: 243 [2021-12-22 00:04:11,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-12-22 00:04:11,199 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 146 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:11,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 500 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 314 Invalid, 0 Unknown, 144 Unchecked, 0.1s Time] [2021-12-22 00:04:11,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-22 00:04:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2021-12-22 00:04:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.2828947368421053) internal successors, (195), 163 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) [2021-12-22 00:04:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 195 transitions. [2021-12-22 00:04:11,202 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 195 transitions. Word has length 32 [2021-12-22 00:04:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:11,202 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 195 transitions. [2021-12-22 00:04:11,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 195 transitions. [2021-12-22 00:04:11,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 00:04:11,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:11,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:11,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:11,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:11,415 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1911073267, now seen corresponding path program 1 times [2021-12-22 00:04:11,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:11,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064253691] [2021-12-22 00:04:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:11,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:11,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:11,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064253691] [2021-12-22 00:04:11,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064253691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:11,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079534824] [2021-12-22 00:04:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:11,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:11,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:11,553 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:11,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 00:04:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 00:04:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:04:11,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:11,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079534824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:11,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:04:11,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-12-22 00:04:11,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719090183] [2021-12-22 00:04:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:11,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:04:11,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:04:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:04:11,744 INFO L87 Difference]: Start difference. First operand 164 states and 195 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 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) [2021-12-22 00:04:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:11,845 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2021-12-22 00:04:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:04:11,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 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 33 [2021-12-22 00:04:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:11,846 INFO L225 Difference]: With dead ends: 178 [2021-12-22 00:04:11,846 INFO L226 Difference]: Without dead ends: 178 [2021-12-22 00:04:11,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-12-22 00:04:11,847 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 116 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:11,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 105 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:11,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-22 00:04:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2021-12-22 00:04:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.2763157894736843) internal successors, (194), 163 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 194 transitions. [2021-12-22 00:04:11,849 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 194 transitions. Word has length 33 [2021-12-22 00:04:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:11,849 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 194 transitions. [2021-12-22 00:04:11,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 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) [2021-12-22 00:04:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 194 transitions. [2021-12-22 00:04:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 00:04:11,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:11,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:11,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:12,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-22 00:04:12,068 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:12,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1302827474, now seen corresponding path program 1 times [2021-12-22 00:04:12,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:12,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953285844] [2021-12-22 00:04:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:12,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:04:12,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:12,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953285844] [2021-12-22 00:04:12,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953285844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:12,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:12,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:04:12,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977049491] [2021-12-22 00:04:12,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:12,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:04:12,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:12,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:04:12,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:12,135 INFO L87 Difference]: Start difference. First operand 164 states and 194 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:12,173 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2021-12-22 00:04:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:04:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-22 00:04:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:12,174 INFO L225 Difference]: With dead ends: 170 [2021-12-22 00:04:12,174 INFO L226 Difference]: Without dead ends: 170 [2021-12-22 00:04:12,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:12,175 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 104 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:12,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 97 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:12,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-22 00:04:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 135. [2021-12-22 00:04:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 123 states have (on average 1.2520325203252032) internal successors, (154), 134 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) [2021-12-22 00:04:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2021-12-22 00:04:12,178 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 36 [2021-12-22 00:04:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:12,178 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2021-12-22 00:04:12,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2021-12-22 00:04:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 00:04:12,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:12,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:12,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 00:04:12,179 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:12,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1302827524, now seen corresponding path program 1 times [2021-12-22 00:04:12,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:12,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209149690] [2021-12-22 00:04:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:12,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:12,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209149690] [2021-12-22 00:04:12,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209149690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:12,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:12,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:04:12,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146057477] [2021-12-22 00:04:12,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:12,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:04:12,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:12,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:04:12,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:12,225 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 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) [2021-12-22 00:04:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:12,371 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2021-12-22 00:04:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:04:12,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 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 36 [2021-12-22 00:04:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:12,372 INFO L225 Difference]: With dead ends: 176 [2021-12-22 00:04:12,373 INFO L226 Difference]: Without dead ends: 176 [2021-12-22 00:04:12,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:04:12,373 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 72 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:12,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 167 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-22 00:04:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 148. [2021-12-22 00:04:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.2647058823529411) internal successors, (172), 147 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2021-12-22 00:04:12,375 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 36 [2021-12-22 00:04:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:12,376 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2021-12-22 00:04:12,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 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) [2021-12-22 00:04:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2021-12-22 00:04:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 00:04:12,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:12,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:12,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 00:04:12,376 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1302827525, now seen corresponding path program 1 times [2021-12-22 00:04:12,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:12,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745235955] [2021-12-22 00:04:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:12,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:12,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:12,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745235955] [2021-12-22 00:04:12,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745235955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:12,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:12,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:04:12,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810085389] [2021-12-22 00:04:12,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:12,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:04:12,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:04:12,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:12,444 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 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) [2021-12-22 00:04:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:12,644 INFO L93 Difference]: Finished difference Result 222 states and 250 transitions. [2021-12-22 00:04:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:04:12,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 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 36 [2021-12-22 00:04:12,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:12,645 INFO L225 Difference]: With dead ends: 222 [2021-12-22 00:04:12,645 INFO L226 Difference]: Without dead ends: 222 [2021-12-22 00:04:12,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:04:12,646 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 128 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:12,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 249 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-22 00:04:12,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 148. [2021-12-22 00:04:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.2573529411764706) internal successors, (171), 147 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) [2021-12-22 00:04:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 171 transitions. [2021-12-22 00:04:12,648 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 171 transitions. Word has length 36 [2021-12-22 00:04:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:12,648 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 171 transitions. [2021-12-22 00:04:12,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 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) [2021-12-22 00:04:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 171 transitions. [2021-12-22 00:04:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 00:04:12,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:12,649 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:12,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 00:04:12,649 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash 904979977, now seen corresponding path program 1 times [2021-12-22 00:04:12,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:12,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019219710] [2021-12-22 00:04:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:12,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:12,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:12,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019219710] [2021-12-22 00:04:12,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019219710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:12,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647445422] [2021-12-22 00:04:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:12,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:12,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:12,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:12,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 00:04:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-22 00:04:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:13,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:13,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:13,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:13,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:13,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:13,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:13,169 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:13,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 00:04:13,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:13,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:13,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:13,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:13,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:13,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:13,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:13,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:13,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 00:04:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:13,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:13,462 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-22 00:04:13,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-12-22 00:04:13,510 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1787 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1787) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|) |c_ULTIMATE.start_main_~first~0#1.base|)) is different from false [2021-12-22 00:04:13,515 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1787 (Array Int Int)) (v_ArrVal_1786 Int)) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~last~0#1.base|) (+ |c_ULTIMATE.start_main_~last~0#1.offset| 12) v_ArrVal_1786)) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1787) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|) |c_ULTIMATE.start_main_~first~0#1.base|)) is different from false [2021-12-22 00:04:13,531 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1787 (Array Int Int)) (v_ArrVal_1784 (Array Int Int)) (v_ArrVal_1786 Int)) (= (select (select (store (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1784))) (store .cse0 |c_ULTIMATE.start_main_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~last~0#1.base|) (+ |c_ULTIMATE.start_main_~last~0#1.offset| 12) v_ArrVal_1786))) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1787) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|) |c_ULTIMATE.start_main_~first~0#1.base|)) is different from false [2021-12-22 00:04:13,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_40| Int) (v_ArrVal_1787 (Array Int Int)) (v_ArrVal_1784 (Array Int Int)) (|v_ULTIMATE.start_main_~last~0#1.offset_15| Int) (v_ArrVal_1786 Int) (v_ArrVal_1778 Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_40|) 0)) (= (select (select (store (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8) v_ArrVal_1778)) |v_ULTIMATE.start_main_~x~0#1.base_40| v_ArrVal_1784))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) (+ |v_ULTIMATE.start_main_~last~0#1.offset_15| 12) v_ArrVal_1786))) |v_ULTIMATE.start_main_~x~0#1.base_40| v_ArrVal_1787) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) |c_ULTIMATE.start_main_~x~0#1.base|) (not (<= |c_ULTIMATE.start_main_~x~0#1.offset| |v_ULTIMATE.start_main_~last~0#1.offset_15|)))) is different from false [2021-12-22 00:04:13,766 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_40| Int) (v_ArrVal_1787 (Array Int Int)) (v_ArrVal_1784 (Array Int Int)) (|v_ULTIMATE.start_main_~last~0#1.offset_15| Int) (v_ArrVal_1776 Int) (v_ArrVal_1786 Int) (v_ArrVal_1778 Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_40|) 0)) (= (select (select (store (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4) v_ArrVal_1776) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8) v_ArrVal_1778)) |v_ULTIMATE.start_main_~x~0#1.base_40| v_ArrVal_1784))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) (+ |v_ULTIMATE.start_main_~last~0#1.offset_15| 12) v_ArrVal_1786))) |v_ULTIMATE.start_main_~x~0#1.base_40| v_ArrVal_1787) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) |c_ULTIMATE.start_main_~x~0#1.base|) (not (<= |c_ULTIMATE.start_main_~x~0#1.offset| |v_ULTIMATE.start_main_~last~0#1.offset_15|)))) is different from false [2021-12-22 00:04:13,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:13,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:13,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:13,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:13,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2021-12-22 00:04:13,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2021-12-22 00:04:13,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:13,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-22 00:04:13,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:13,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-22 00:04:13,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 00:04:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-22 00:04:13,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647445422] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:13,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:13,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14] total 32 [2021-12-22 00:04:13,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985753609] [2021-12-22 00:04:13,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:13,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 00:04:13,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:13,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 00:04:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=623, Unknown=7, NotChecked=270, Total=992 [2021-12-22 00:04:13,826 INFO L87 Difference]: Start difference. First operand 148 states and 171 transitions. Second operand has 32 states, 32 states have (on average 3.25) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:14,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:14,659 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2021-12-22 00:04:14,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 00:04:14,659 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.25) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-22 00:04:14,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:14,660 INFO L225 Difference]: With dead ends: 234 [2021-12-22 00:04:14,660 INFO L226 Difference]: Without dead ends: 234 [2021-12-22 00:04:14,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=287, Invalid=1794, Unknown=9, NotChecked=460, Total=2550 [2021-12-22 00:04:14,661 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 145 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 691 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:14,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 568 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 553 Invalid, 0 Unknown, 691 Unchecked, 0.2s Time] [2021-12-22 00:04:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-22 00:04:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 169. [2021-12-22 00:04:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 157 states have (on average 1.2356687898089171) internal successors, (194), 168 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 194 transitions. [2021-12-22 00:04:14,664 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 194 transitions. Word has length 38 [2021-12-22 00:04:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:14,664 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 194 transitions. [2021-12-22 00:04:14,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.25) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 194 transitions. [2021-12-22 00:04:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 00:04:14,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:14,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:14,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:14,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:14,879 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2113196924, now seen corresponding path program 1 times [2021-12-22 00:04:14,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:14,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500640320] [2021-12-22 00:04:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:14,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:14,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:14,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500640320] [2021-12-22 00:04:14,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500640320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:14,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:14,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 00:04:14,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900237837] [2021-12-22 00:04:14,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:14,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:04:14,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:04:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:04:14,930 INFO L87 Difference]: Start difference. First operand 169 states and 194 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:15,148 INFO L93 Difference]: Finished difference Result 286 states and 318 transitions. [2021-12-22 00:04:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 00:04:15,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-22 00:04:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:15,149 INFO L225 Difference]: With dead ends: 286 [2021-12-22 00:04:15,149 INFO L226 Difference]: Without dead ends: 286 [2021-12-22 00:04:15,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-12-22 00:04:15,150 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 286 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:15,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 417 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-22 00:04:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 171. [2021-12-22 00:04:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 159 states have (on average 1.2327044025157232) internal successors, (196), 170 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 196 transitions. [2021-12-22 00:04:15,153 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 196 transitions. Word has length 38 [2021-12-22 00:04:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:15,153 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 196 transitions. [2021-12-22 00:04:15,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 196 transitions. [2021-12-22 00:04:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 00:04:15,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:15,153 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:15,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 00:04:15,154 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1084595048, now seen corresponding path program 1 times [2021-12-22 00:04:15,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:15,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092426090] [2021-12-22 00:04:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:15,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:15,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:15,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092426090] [2021-12-22 00:04:15,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092426090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:15,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:15,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 00:04:15,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069579698] [2021-12-22 00:04:15,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:15,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:04:15,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:04:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:04:15,211 INFO L87 Difference]: Start difference. First operand 171 states and 196 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:15,460 INFO L93 Difference]: Finished difference Result 283 states and 315 transitions. [2021-12-22 00:04:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 00:04:15,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-22 00:04:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:15,461 INFO L225 Difference]: With dead ends: 283 [2021-12-22 00:04:15,461 INFO L226 Difference]: Without dead ends: 283 [2021-12-22 00:04:15,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-12-22 00:04:15,461 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 192 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:15,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 347 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:04:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-22 00:04:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 172. [2021-12-22 00:04:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.23125) internal successors, (197), 171 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 197 transitions. [2021-12-22 00:04:15,464 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 197 transitions. Word has length 39 [2021-12-22 00:04:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 197 transitions. [2021-12-22 00:04:15,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 197 transitions. [2021-12-22 00:04:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 00:04:15,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:15,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:15,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 00:04:15,465 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:15,465 INFO L85 PathProgramCache]: Analyzing trace with hash 693362007, now seen corresponding path program 1 times [2021-12-22 00:04:15,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:15,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643094470] [2021-12-22 00:04:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:15,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:15,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:15,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643094470] [2021-12-22 00:04:15,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643094470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:15,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104996232] [2021-12-22 00:04:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:15,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:15,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:15,527 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:15,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 00:04:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:15,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 00:04:15,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:15,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:15,728 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:15,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 00:04:15,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:15,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:15,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-22 00:04:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:15,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:15,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 00:04:15,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-22 00:04:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:16,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104996232] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:16,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:16,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2021-12-22 00:04:16,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826469483] [2021-12-22 00:04:16,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:16,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 00:04:16,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:16,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 00:04:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-12-22 00:04:16,134 INFO L87 Difference]: Start difference. First operand 172 states and 197 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:16,597 INFO L93 Difference]: Finished difference Result 260 states and 288 transitions. [2021-12-22 00:04:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 00:04:16,597 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-22 00:04:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:16,598 INFO L225 Difference]: With dead ends: 260 [2021-12-22 00:04:16,598 INFO L226 Difference]: Without dead ends: 260 [2021-12-22 00:04:16,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-12-22 00:04:16,599 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 307 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:16,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 575 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 698 Invalid, 0 Unknown, 35 Unchecked, 0.3s Time] [2021-12-22 00:04:16,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-22 00:04:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 172. [2021-12-22 00:04:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.225) internal successors, (196), 171 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:16,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2021-12-22 00:04:16,602 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 40 [2021-12-22 00:04:16,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:16,602 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2021-12-22 00:04:16,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2021-12-22 00:04:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 00:04:16,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:16,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:16,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-22 00:04:16,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-22 00:04:16,811 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash 737292038, now seen corresponding path program 1 times [2021-12-22 00:04:16,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:16,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965046983] [2021-12-22 00:04:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:16,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:04:16,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965046983] [2021-12-22 00:04:16,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965046983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:16,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:16,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:04:16,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362274349] [2021-12-22 00:04:16,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:16,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:04:16,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:16,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:04:16,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:04:16,857 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:16,896 INFO L93 Difference]: Finished difference Result 171 states and 194 transitions. [2021-12-22 00:04:16,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:04:16,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-22 00:04:16,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:16,897 INFO L225 Difference]: With dead ends: 171 [2021-12-22 00:04:16,897 INFO L226 Difference]: Without dead ends: 171 [2021-12-22 00:04:16,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:16,897 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:16,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-22 00:04:16,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-12-22 00:04:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 160 states have (on average 1.2125) internal successors, (194), 170 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 194 transitions. [2021-12-22 00:04:16,900 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 194 transitions. Word has length 40 [2021-12-22 00:04:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:16,900 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 194 transitions. [2021-12-22 00:04:16,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 194 transitions. [2021-12-22 00:04:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 00:04:16,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:16,900 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:16,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-22 00:04:16,900 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:16,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1696179932, now seen corresponding path program 1 times [2021-12-22 00:04:16,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:16,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522981571] [2021-12-22 00:04:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:16,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:17,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:17,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522981571] [2021-12-22 00:04:17,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522981571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:17,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428623395] [2021-12-22 00:04:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:17,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:17,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:17,083 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:17,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 00:04:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:17,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 00:04:17,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:17,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:17,306 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 00:04:17,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 00:04:17,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:17,481 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 00:04:17,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-22 00:04:17,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-22 00:04:17,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-22 00:04:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:17,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:17,695 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2271 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2271) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12)) |c_ULTIMATE.start_main_~first~0#1.base|))) (forall ((v_ArrVal_2271 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2271) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12))) 1))) is different from false [2021-12-22 00:04:17,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:17,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-22 00:04:17,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:17,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2021-12-22 00:04:17,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-22 00:04:17,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:17,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-22 00:04:17,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:17,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-22 00:04:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:17,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428623395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:17,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:17,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2021-12-22 00:04:17,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408360791] [2021-12-22 00:04:17,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:17,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 00:04:17,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:17,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 00:04:17,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=465, Unknown=1, NotChecked=44, Total=600 [2021-12-22 00:04:17,888 INFO L87 Difference]: Start difference. First operand 171 states and 194 transitions. Second operand has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:18,384 INFO L93 Difference]: Finished difference Result 255 states and 281 transitions. [2021-12-22 00:04:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 00:04:18,385 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-22 00:04:18,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:18,385 INFO L225 Difference]: With dead ends: 255 [2021-12-22 00:04:18,385 INFO L226 Difference]: Without dead ends: 255 [2021-12-22 00:04:18,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=964, Unknown=1, NotChecked=66, Total=1260 [2021-12-22 00:04:18,386 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 243 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:18,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 475 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 700 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2021-12-22 00:04:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-22 00:04:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 225. [2021-12-22 00:04:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 214 states have (on average 1.1962616822429906) internal successors, (256), 224 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 256 transitions. [2021-12-22 00:04:18,389 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 256 transitions. Word has length 42 [2021-12-22 00:04:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:18,389 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 256 transitions. [2021-12-22 00:04:18,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 256 transitions. [2021-12-22 00:04:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 00:04:18,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:18,390 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:18,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:18,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-22 00:04:18,591 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:18,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:18,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1696179933, now seen corresponding path program 1 times [2021-12-22 00:04:18,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:18,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096284656] [2021-12-22 00:04:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:18,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:18,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:18,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096284656] [2021-12-22 00:04:18,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096284656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:18,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420426900] [2021-12-22 00:04:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:18,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:18,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:18,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:18,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 00:04:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:18,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-22 00:04:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:18,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:19,043 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:19,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 00:04:19,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 00:04:19,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 00:04:19,230 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 00:04:19,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-12-22 00:04:19,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-22 00:04:19,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-22 00:04:19,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 00:04:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:19,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:19,445 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2432 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2432) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12)) 12))) (forall ((v_ArrVal_2433 (Array Int Int)) (v_ArrVal_2432 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2432) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0) 16) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2433) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0)))))) is different from false [2021-12-22 00:04:19,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:19,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-22 00:04:19,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:19,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-12-22 00:04:19,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 00:04:19,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:19,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-12-22 00:04:19,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:19,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-12-22 00:04:19,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:19,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:19,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-22 00:04:19,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:19,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:19,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-22 00:04:19,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-22 00:04:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:19,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420426900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:19,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:19,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2021-12-22 00:04:19,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274028470] [2021-12-22 00:04:19,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:19,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 00:04:19,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 00:04:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=519, Unknown=1, NotChecked=46, Total=650 [2021-12-22 00:04:19,730 INFO L87 Difference]: Start difference. First operand 225 states and 256 transitions. Second operand has 26 states, 25 states have (on average 4.76) internal successors, (119), 26 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:20,300 INFO L93 Difference]: Finished difference Result 308 states and 348 transitions. [2021-12-22 00:04:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 00:04:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.76) internal successors, (119), 26 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-22 00:04:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:20,302 INFO L225 Difference]: With dead ends: 308 [2021-12-22 00:04:20,303 INFO L226 Difference]: Without dead ends: 308 [2021-12-22 00:04:20,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=1054, Unknown=3, NotChecked=68, Total=1332 [2021-12-22 00:04:20,303 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 184 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:20,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 629 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 596 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2021-12-22 00:04:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-22 00:04:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 236. [2021-12-22 00:04:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 225 states have (on average 1.2177777777777778) internal successors, (274), 235 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 274 transitions. [2021-12-22 00:04:20,307 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 274 transitions. Word has length 42 [2021-12-22 00:04:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:20,307 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 274 transitions. [2021-12-22 00:04:20,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.76) internal successors, (119), 26 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 274 transitions. [2021-12-22 00:04:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 00:04:20,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:20,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:20,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:20,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-22 00:04:20,511 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash -131950583, now seen corresponding path program 1 times [2021-12-22 00:04:20,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:20,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248769056] [2021-12-22 00:04:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:20,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:20,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:20,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248769056] [2021-12-22 00:04:20,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248769056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:20,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988324685] [2021-12-22 00:04:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:20,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:20,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:20,811 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:20,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 00:04:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:20,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-22 00:04:20,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:20,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:20,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:21,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:21,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:21,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:21,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:21,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:21,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:21,116 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 00:04:21,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-22 00:04:21,140 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 00:04:21,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-22 00:04:21,247 INFO L353 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-12-22 00:04:21,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 48 [2021-12-22 00:04:21,263 INFO L353 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2021-12-22 00:04:21,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 41 [2021-12-22 00:04:21,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-22 00:04:21,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 00:04:21,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-22 00:04:21,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:21,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2021-12-22 00:04:21,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:21,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2021-12-22 00:04:21,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-12-22 00:04:21,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-12-22 00:04:21,442 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-22 00:04:21,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2021-12-22 00:04:21,452 INFO L353 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-22 00:04:21,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 40 [2021-12-22 00:04:21,747 INFO L353 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-12-22 00:04:21,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 57 [2021-12-22 00:04:21,762 INFO L353 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-12-22 00:04:21,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-12-22 00:04:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:21,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:22,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:22,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:22,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:22,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:22,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:22,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:22,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:22,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:22,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:23,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:23,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:23,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:23,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:23,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:23,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:23,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:23,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 545 treesize of output 489 [2021-12-22 00:04:23,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:23,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 459 treesize of output 468 [2021-12-22 00:04:23,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:23,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 468 treesize of output 323 [2021-12-22 00:04:23,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:23,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 182 [2021-12-22 00:04:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:23,954 INFO L353 Elim1Store]: treesize reduction 63, result has 49.2 percent of original size [2021-12-22 00:04:23,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 182 treesize of output 210 [2021-12-22 00:04:23,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:23,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 245 [2021-12-22 00:04:23,974 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:04:23,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 248 [2021-12-22 00:04:24,027 INFO L353 Elim1Store]: treesize reduction 95, result has 39.1 percent of original size [2021-12-22 00:04:24,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 248 treesize of output 260 [2021-12-22 00:04:24,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:24,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 375 treesize of output 369 [2021-12-22 00:04:24,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 265 [2021-12-22 00:04:24,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:04:24,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 228 [2021-12-22 00:04:24,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-22 00:04:24,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-22 00:04:24,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-22 00:04:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:24,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988324685] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:24,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:24,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 22] total 54 [2021-12-22 00:04:24,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379524890] [2021-12-22 00:04:24,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:24,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-22 00:04:24,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-22 00:04:24,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2172, Unknown=472, NotChecked=0, Total=2862 [2021-12-22 00:04:24,231 INFO L87 Difference]: Start difference. First operand 236 states and 274 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:27,404 INFO L93 Difference]: Finished difference Result 486 states and 582 transitions. [2021-12-22 00:04:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-22 00:04:27,405 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-22 00:04:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:27,406 INFO L225 Difference]: With dead ends: 486 [2021-12-22 00:04:27,406 INFO L226 Difference]: Without dead ends: 486 [2021-12-22 00:04:27,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=930, Invalid=7340, Unknown=850, NotChecked=0, Total=9120 [2021-12-22 00:04:27,408 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 472 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 790 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:27,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 1397 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1558 Invalid, 0 Unknown, 790 Unchecked, 0.7s Time] [2021-12-22 00:04:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-12-22 00:04:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 246. [2021-12-22 00:04:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 235 states have (on average 1.2085106382978723) internal successors, (284), 245 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 284 transitions. [2021-12-22 00:04:27,412 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 284 transitions. Word has length 42 [2021-12-22 00:04:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:27,412 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 284 transitions. [2021-12-22 00:04:27,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 284 transitions. [2021-12-22 00:04:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 00:04:27,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:27,413 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:27,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:27,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-22 00:04:27,630 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:27,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:27,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1041969739, now seen corresponding path program 1 times [2021-12-22 00:04:27,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:27,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338090854] [2021-12-22 00:04:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:27,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:27,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:27,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338090854] [2021-12-22 00:04:27,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338090854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:27,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776254814] [2021-12-22 00:04:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:27,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:27,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:27,750 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:27,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 00:04:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-22 00:04:27,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:27,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:27,979 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:27,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 00:04:28,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:04:28,090 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 00:04:28,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-12-22 00:04:28,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-22 00:04:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:28,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:28,181 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2750 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2750) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12)) 0))) is different from false [2021-12-22 00:04:28,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:28,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-22 00:04:28,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:28,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2021-12-22 00:04:28,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-22 00:04:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:28,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776254814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:28,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:28,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2021-12-22 00:04:28,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143228325] [2021-12-22 00:04:28,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:28,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 00:04:28,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:28,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 00:04:28,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2021-12-22 00:04:28,374 INFO L87 Difference]: Start difference. First operand 246 states and 284 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:28,662 INFO L93 Difference]: Finished difference Result 301 states and 338 transitions. [2021-12-22 00:04:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 00:04:28,663 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-22 00:04:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:28,664 INFO L225 Difference]: With dead ends: 301 [2021-12-22 00:04:28,664 INFO L226 Difference]: Without dead ends: 301 [2021-12-22 00:04:28,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=441, Unknown=1, NotChecked=44, Total=600 [2021-12-22 00:04:28,664 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 128 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:28,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 622 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 395 Invalid, 0 Unknown, 190 Unchecked, 0.2s Time] [2021-12-22 00:04:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-22 00:04:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 246. [2021-12-22 00:04:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 235 states have (on average 1.2) internal successors, (282), 245 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 282 transitions. [2021-12-22 00:04:28,668 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 282 transitions. Word has length 43 [2021-12-22 00:04:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:28,668 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 282 transitions. [2021-12-22 00:04:28,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 282 transitions. [2021-12-22 00:04:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 00:04:28,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:28,669 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:28,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:28,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:28,887 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2058655426, now seen corresponding path program 1 times [2021-12-22 00:04:28,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:28,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400315950] [2021-12-22 00:04:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:28,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:29,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:29,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400315950] [2021-12-22 00:04:29,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400315950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:29,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266006188] [2021-12-22 00:04:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:29,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:29,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:29,026 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:29,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 00:04:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:29,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-22 00:04:29,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:29,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:29,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 00:04:29,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:29,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:29,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:29,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:29,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:29,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:29,369 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:29,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 00:04:29,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:29,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:29,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:29,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:29,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:29,494 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-22 00:04:29,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:29,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:29,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 00:04:29,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 00:04:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:29,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:29,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:29,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-12-22 00:04:29,722 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2923 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2923) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12)))) is different from false [2021-12-22 00:04:29,726 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2923 (Array Int Int)) (|ULTIMATE.start_main_~last~0#1.offset| Int)) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~last~0#1.base|) (+ |ULTIMATE.start_main_~last~0#1.offset| 12) |c_ULTIMATE.start_main_~x~0#1.offset|)) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2923) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12)))) is different from false [2021-12-22 00:04:29,741 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2923 (Array Int Int)) (v_ArrVal_2920 (Array Int Int)) (|ULTIMATE.start_main_~last~0#1.offset| Int)) (<= 0 (select (select (store (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2920))) (store .cse0 |c_ULTIMATE.start_main_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~last~0#1.base|) (+ |ULTIMATE.start_main_~last~0#1.offset| 12) |c_ULTIMATE.start_main_~x~0#1.offset|))) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2923) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12)))) is different from false [2021-12-22 00:04:30,040 INFO L353 Elim1Store]: treesize reduction 320, result has 13.3 percent of original size [2021-12-22 00:04:30,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 77 [2021-12-22 00:04:30,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2021-12-22 00:04:30,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2021-12-22 00:04:30,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 00:04:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-22 00:04:30,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266006188] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:30,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:30,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 16] total 32 [2021-12-22 00:04:30,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456013739] [2021-12-22 00:04:30,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:30,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 00:04:30,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:30,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 00:04:30,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=729, Unknown=36, NotChecked=174, Total=1056 [2021-12-22 00:04:30,072 INFO L87 Difference]: Start difference. First operand 246 states and 282 transitions. Second operand has 33 states, 32 states have (on average 3.5625) internal successors, (114), 33 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) [2021-12-22 00:04:42,072 WARN L227 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 37 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-22 00:04:50,335 WARN L227 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 41 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-22 00:04:50,675 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_main_~x~0#1.base|) 1) (= (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12) 12) (not (= |c_ULTIMATE.start_main_~last~0#1.base| |c_ULTIMATE.start_main_~x~0#1.base|)) (= |c_ULTIMATE.start_main_~x~0#1.offset| 0) (= (+ |c_ULTIMATE.start_main_~last~0#1.offset| 12) 12) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 12)) 0) (= |c_ULTIMATE.start_main_~last~0#1.base| |c_ULTIMATE.start_main_~first~0#1.base|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~last~0#1.base|) 12) 0) (forall ((v_ArrVal_2923 (Array Int Int)) (|ULTIMATE.start_main_~last~0#1.offset| Int)) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~last~0#1.base|) (+ |ULTIMATE.start_main_~last~0#1.offset| 12) |c_ULTIMATE.start_main_~x~0#1.offset|)) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2923) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12)))) (= |c_ULTIMATE.start_main_~first~0#1.offset| 0)) is different from false [2021-12-22 00:04:51,000 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12) 12) (not (= |c_ULTIMATE.start_main_~last~0#1.base| |c_ULTIMATE.start_main_~x~0#1.base|)) (= |c_ULTIMATE.start_main_~x~0#1.offset| 0) (= (+ |c_ULTIMATE.start_main_~last~0#1.offset| 12) 12) (= |c_ULTIMATE.start_main_~last~0#1.base| |c_ULTIMATE.start_main_~first~0#1.base|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~last~0#1.base|) 12) 0) (forall ((v_ArrVal_2923 (Array Int Int)) (|ULTIMATE.start_main_~last~0#1.offset| Int)) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~last~0#1.base|) (+ |ULTIMATE.start_main_~last~0#1.offset| 12) |c_ULTIMATE.start_main_~x~0#1.offset|)) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2923) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12)))) (= |c_ULTIMATE.start_main_~first~0#1.offset| 0)) is different from false [2021-12-22 00:04:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:51,876 INFO L93 Difference]: Finished difference Result 484 states and 542 transitions. [2021-12-22 00:04:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-22 00:04:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.5625) internal successors, (114), 33 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) Word has length 44 [2021-12-22 00:04:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:51,878 INFO L225 Difference]: With dead ends: 484 [2021-12-22 00:04:51,878 INFO L226 Difference]: Without dead ends: 484 [2021-12-22 00:04:51,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=657, Invalid=3610, Unknown=43, NotChecked=660, Total=4970 [2021-12-22 00:04:51,880 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 534 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 922 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:51,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 769 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1009 Invalid, 0 Unknown, 922 Unchecked, 0.4s Time] [2021-12-22 00:04:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-12-22 00:04:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 299. [2021-12-22 00:04:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 288 states have (on average 1.2222222222222223) internal successors, (352), 298 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 352 transitions. [2021-12-22 00:04:51,884 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 352 transitions. Word has length 44 [2021-12-22 00:04:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:51,885 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 352 transitions. [2021-12-22 00:04:51,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.5625) internal successors, (114), 33 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) [2021-12-22 00:04:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 352 transitions. [2021-12-22 00:04:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 00:04:51,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:51,885 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:51,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:52,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-22 00:04:52,104 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1393098207, now seen corresponding path program 2 times [2021-12-22 00:04:52,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:52,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338466570] [2021-12-22 00:04:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:52,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:52,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:52,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338466570] [2021-12-22 00:04:52,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338466570] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:52,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16854198] [2021-12-22 00:04:52,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:04:52,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:52,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:52,287 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:52,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 00:04:52,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 00:04:52,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:04:52,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 00:04:52,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:52,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:04:52,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:52,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:52,579 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:52,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 00:04:52,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:52,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:52,675 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:52,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 00:04:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:04:52,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:53,005 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 00:04:53,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-22 00:04:53,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-12-22 00:04:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:04:53,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16854198] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:53,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:53,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 19 [2021-12-22 00:04:53,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903408934] [2021-12-22 00:04:53,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:53,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 00:04:53,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 00:04:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-12-22 00:04:53,185 INFO L87 Difference]: Start difference. First operand 299 states and 352 transitions. Second operand has 20 states, 19 states have (on average 6.315789473684211) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:53,491 INFO L93 Difference]: Finished difference Result 474 states and 567 transitions. [2021-12-22 00:04:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 00:04:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.315789473684211) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-22 00:04:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:53,492 INFO L225 Difference]: With dead ends: 474 [2021-12-22 00:04:53,492 INFO L226 Difference]: Without dead ends: 474 [2021-12-22 00:04:53,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-12-22 00:04:53,493 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 305 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:53,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 381 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 395 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2021-12-22 00:04:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-12-22 00:04:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 292. [2021-12-22 00:04:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 281 states have (on average 1.2241992882562278) internal successors, (344), 291 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 344 transitions. [2021-12-22 00:04:53,497 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 344 transitions. Word has length 44 [2021-12-22 00:04:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:53,497 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 344 transitions. [2021-12-22 00:04:53,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.315789473684211) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:53,497 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 344 transitions. [2021-12-22 00:04:53,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 00:04:53,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:53,498 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:53,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:53,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-22 00:04:53,715 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash 489910956, now seen corresponding path program 1 times [2021-12-22 00:04:53,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:53,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359881973] [2021-12-22 00:04:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:53,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:53,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:53,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359881973] [2021-12-22 00:04:53,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359881973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:53,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270390888] [2021-12-22 00:04:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:53,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:53,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:53,805 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:53,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 00:04:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:54,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 00:04:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:04:54,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:54,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:54,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-12-22 00:04:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:04:54,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270390888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:54,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:04:54,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2021-12-22 00:04:54,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108016663] [2021-12-22 00:04:54,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:54,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 00:04:54,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:04:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 00:04:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:04:54,402 INFO L87 Difference]: Start difference. First operand 292 states and 344 transitions. Second operand has 11 states, 10 states have (on average 11.5) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:54,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:54,522 INFO L93 Difference]: Finished difference Result 310 states and 362 transitions. [2021-12-22 00:04:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:04:54,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.5) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-22 00:04:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:54,524 INFO L225 Difference]: With dead ends: 310 [2021-12-22 00:04:54,524 INFO L226 Difference]: Without dead ends: 310 [2021-12-22 00:04:54,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:04:54,524 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 201 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:54,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 207 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-22 00:04:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 282. [2021-12-22 00:04:54,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 271 states have (on average 1.2177121771217712) internal successors, (330), 281 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 330 transitions. [2021-12-22 00:04:54,527 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 330 transitions. Word has length 46 [2021-12-22 00:04:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:54,528 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 330 transitions. [2021-12-22 00:04:54,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.5) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:04:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 330 transitions. [2021-12-22 00:04:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 00:04:54,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:54,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:54,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-22 00:04:54,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:54,743 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-12-22 00:04:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:54,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1931630812, now seen corresponding path program 1 times [2021-12-22 00:04:54,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:04:54,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344845775] [2021-12-22 00:04:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:54,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:04:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:55,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:04:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344845775] [2021-12-22 00:04:55,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344845775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176560784] [2021-12-22 00:04:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:55,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:04:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:55,070 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:04:55,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-22 00:04:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-22 00:04:55,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:55,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 00:04:55,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 00:04:55,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:55,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 00:04:55,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:55,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 00:04:55,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:55,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-22 00:04:55,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-22 00:04:55,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:55,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-22 00:04:55,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-22 00:04:55,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,467 INFO L353 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2021-12-22 00:04:55,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-12-22 00:04:55,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,498 INFO L353 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2021-12-22 00:04:55,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 51 [2021-12-22 00:04:55,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,738 INFO L353 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2021-12-22 00:04:55,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 84 [2021-12-22 00:04:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,780 INFO L353 Elim1Store]: treesize reduction 72, result has 41.9 percent of original size [2021-12-22 00:04:55,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 83 [2021-12-22 00:04:56,446 INFO L353 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-22 00:04:56,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 126 [2021-12-22 00:04:56,462 INFO L353 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-22 00:04:56,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 112 [2021-12-22 00:04:56,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-22 00:04:56,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 00:04:56,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:56,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-12-22 00:04:56,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:56,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-22 00:04:56,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 00:04:56,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 00:04:56,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 00:04:56,935 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:04:56,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 36 [2021-12-22 00:04:56,943 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:04:56,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2021-12-22 00:04:56,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:56,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2021-12-22 00:04:56,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:56,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-12-22 00:04:57,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:57,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-12-22 00:04:57,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:04:57,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-12-22 00:04:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:57,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:05:07,311 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1.offset| Int) (v_ArrVal_3497 (Array Int Int)) (|ULTIMATE.start_main_~y~0#1.base| Int) (v_ArrVal_3498 (Array Int Int)) (v_ArrVal_3501 Int) (v_ArrVal_3487 Int) (|ULTIMATE.start_main_~x~1#1.offset| Int) (v_ArrVal_3494 Int) (|v_ULTIMATE.start_main_#t~mem8#1.offset_26| Int) (v_ArrVal_3493 Int)) (let ((.cse4 (+ |v_ULTIMATE.start_main_#t~mem8#1.offset_26| 4))) (let ((.cse0 (store (select (store (let ((.cse5 (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~y~0#1.base| (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~y~0#1.base|) |ULTIMATE.start_main_~y~0#1.offset| v_ArrVal_3487)))) (store .cse5 |c_ULTIMATE.start_main_#t~mem7#1.base| (store (select .cse5 |c_ULTIMATE.start_main_#t~mem7#1.base|) .cse4 v_ArrVal_3493))) |ULTIMATE.start_main_~y~0#1.base| v_ArrVal_3498) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| v_ArrVal_3501)) (.cse1 (store (select (store (let ((.cse3 (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~y~0#1.base| (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~y~0#1.base|) |ULTIMATE.start_main_~y~0#1.offset| |c_ULTIMATE.start_main_#t~mem7#1.base|)))) (store .cse3 |c_ULTIMATE.start_main_#t~mem7#1.base| (store (select .cse3 |c_ULTIMATE.start_main_#t~mem7#1.base|) .cse4 v_ArrVal_3494))) |ULTIMATE.start_main_~y~0#1.base| v_ArrVal_3497) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| |ULTIMATE.start_main_~y~0#1.base|))) (or (not (<= 0 |ULTIMATE.start_main_~x~1#1.offset|)) (not (<= |v_ULTIMATE.start_main_#t~mem8#1.offset_26| v_ArrVal_3487)) (not (<= v_ArrVal_3487 |c_ULTIMATE.start_main_#t~mem7#1.offset|)) (not (= (select .cse0 |ULTIMATE.start_main_~x~1#1.offset|) 0)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 12))) (and (= (select .cse1 .cse2) 0) (= (select .cse0 .cse2) 0))) (not (<= |ULTIMATE.start_main_~x~1#1.offset| 0)) (= (select .cse1 |ULTIMATE.start_main_~x~1#1.offset|) |c_ULTIMATE.start_main_~x~0#1.base|))))) is different from false