./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/array-memsafety/cstrspn-alloca-1.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 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:39:02,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:39:02,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:39:02,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:39:02,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:39:02,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:39:02,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:39:02,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:39:02,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:39:02,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:39:02,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:39:02,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:39:02,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:39:02,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:39:02,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:39:02,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:39:02,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:39:02,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:39:02,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:39:02,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:39:02,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:39:02,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:39:02,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:39:02,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:39:02,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:39:02,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:39:02,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:39:02,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:39:02,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:39:02,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:39:02,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:39:02,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:39:02,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:39:02,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:39:02,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:39:02,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:39:02,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:39:02,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:39:02,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:39:02,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:39:02,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:39:02,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:39:02,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:39:02,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:39:02,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:39:02,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:39:02,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:39:02,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:39:02,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:39:02,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:39:02,719 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:39:02,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:39:02,720 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:39:02,720 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:39:02,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:39:02,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:39:02,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:39:02,721 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:39:02,721 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:39:02,721 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:39:02,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:39:02,721 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:39:02,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:39:02,722 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:39:02,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:39:02,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:39:02,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:39:02,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:39:02,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:39:02,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:39:02,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:39:02,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:39:02,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:39:02,725 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 [2021-12-18 19:39:02,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:39:02,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:39:02,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:39:02,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:39:02,920 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:39:02,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-12-18 19:39:02,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00e90537e/25ec22f18d924d4cacfe1543cc0bf798/FLAG87d7e49fb [2021-12-18 19:39:03,379 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:39:03,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-12-18 19:39:03,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00e90537e/25ec22f18d924d4cacfe1543cc0bf798/FLAG87d7e49fb [2021-12-18 19:39:03,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00e90537e/25ec22f18d924d4cacfe1543cc0bf798 [2021-12-18 19:39:03,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:39:03,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:39:03,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:39:03,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:39:03,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:39:03,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7304f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03, skipping insertion in model container [2021-12-18 19:39:03,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:39:03,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:39:03,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:39:03,659 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:39:03,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:39:03,710 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:39:03,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03 WrapperNode [2021-12-18 19:39:03,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:39:03,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:39:03,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:39:03,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:39:03,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,762 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2021-12-18 19:39:03,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:39:03,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:39:03,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:39:03,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:39:03,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:39:03,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:39:03,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:39:03,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:39:03,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (1/1) ... [2021-12-18 19:39:03,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:39:03,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:03,844 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) [2021-12-18 19:39:03,852 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 [2021-12-18 19:39:03,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:39:03,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:39:03,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:39:03,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:39:03,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:39:03,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:39:03,950 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:39:03,951 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:39:04,137 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:39:04,141 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:39:04,141 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-18 19:39:04,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:39:04 BoogieIcfgContainer [2021-12-18 19:39:04,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:39:04,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:39:04,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:39:04,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:39:04,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:39:03" (1/3) ... [2021-12-18 19:39:04,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d1c382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:39:04, skipping insertion in model container [2021-12-18 19:39:04,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:03" (2/3) ... [2021-12-18 19:39:04,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d1c382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:39:04, skipping insertion in model container [2021-12-18 19:39:04,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:39:04" (3/3) ... [2021-12-18 19:39:04,154 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2021-12-18 19:39:04,159 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:39:04,159 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-18 19:39:04,191 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:39:04,196 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 [2021-12-18 19:39:04,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-18 19:39:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:39:04,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:04,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:04,224 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-18 19:39:04,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:04,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105929073] [2021-12-18 19:39:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:04,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:04,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:04,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105929073] [2021-12-18 19:39:04,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105929073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:04,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:04,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:39:04,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749890165] [2021-12-18 19:39:04,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:04,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:39:04,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:04,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:39:04,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:39:04,505 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-12-18 19:39:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:04,569 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-18 19:39:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:39:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2021-12-18 19:39:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:04,577 INFO L225 Difference]: With dead ends: 100 [2021-12-18 19:39:04,577 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 19:39:04,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:39:04,584 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:04,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 19:39:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2021-12-18 19:39:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-12-18 19:39:04,606 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2021-12-18 19:39:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:04,607 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-12-18 19:39:04,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-12-18 19:39:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-12-18 19:39:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:39:04,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:04,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:04,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:39:04,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:04,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-18 19:39:04,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:04,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963765905] [2021-12-18 19:39:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:04,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:04,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:04,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963765905] [2021-12-18 19:39:04,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963765905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:04,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:04,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:39:04,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464671251] [2021-12-18 19:39:04,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:04,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:39:04,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:04,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:39:04,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:39:04,652 INFO L87 Difference]: Start difference. First operand 55 states and 63 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) [2021-12-18 19:39:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:04,682 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-18 19:39:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:39:04,683 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 [2021-12-18 19:39:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:04,685 INFO L225 Difference]: With dead ends: 53 [2021-12-18 19:39:04,694 INFO L226 Difference]: Without dead ends: 53 [2021-12-18 19:39:04,695 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 [2021-12-18 19:39:04,699 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:04,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-18 19:39:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-18 19:39:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-18 19:39:04,709 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2021-12-18 19:39:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:04,710 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-18 19:39:04,710 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) [2021-12-18 19:39:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-18 19:39:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:39:04,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:04,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:04,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:39:04,712 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:04,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-18 19:39:04,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:04,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128961456] [2021-12-18 19:39:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:04,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:04,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:04,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128961456] [2021-12-18 19:39:04,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128961456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:04,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:04,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:39:04,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255486] [2021-12-18 19:39:04,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:04,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:39:04,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:39:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:39:04,801 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-12-18 19:39:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:04,882 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-12-18 19:39:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:39:04,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 [2021-12-18 19:39:04,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:04,884 INFO L225 Difference]: With dead ends: 97 [2021-12-18 19:39:04,884 INFO L226 Difference]: Without dead ends: 97 [2021-12-18 19:39:04,884 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 [2021-12-18 19:39:04,885 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:04,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:39:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-18 19:39:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-12-18 19:39:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-18 19:39:04,895 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2021-12-18 19:39:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:04,895 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-18 19:39:04,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-12-18 19:39:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-18 19:39:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:39:04,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:04,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:04,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:39:04,897 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-18 19:39:04,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:04,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921935174] [2021-12-18 19:39:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:04,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:04,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:04,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921935174] [2021-12-18 19:39:04,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921935174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:04,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:04,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:39:04,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554982350] [2021-12-18 19:39:04,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:04,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:39:04,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:04,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:39:04,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:39:04,946 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:04,968 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-12-18 19:39:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:39:04,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:39:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:04,969 INFO L225 Difference]: With dead ends: 54 [2021-12-18 19:39:04,969 INFO L226 Difference]: Without dead ends: 54 [2021-12-18 19:39:04,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:39:04,970 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:04,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-18 19:39:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-18 19:39:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-18 19:39:04,973 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2021-12-18 19:39:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:04,974 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-18 19:39:04,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-18 19:39:04,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:39:04,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:04,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:04,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:39:04,975 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:04,975 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-18 19:39:04,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:04,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264716387] [2021-12-18 19:39:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:04,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:05,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:05,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264716387] [2021-12-18 19:39:05,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264716387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:05,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:05,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:39:05,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409029622] [2021-12-18 19:39:05,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:05,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:39:05,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:05,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:39:05,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:39:05,002 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:05,019 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-12-18 19:39:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:39:05,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:39:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:05,020 INFO L225 Difference]: With dead ends: 98 [2021-12-18 19:39:05,020 INFO L226 Difference]: Without dead ends: 98 [2021-12-18 19:39:05,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:39:05,021 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:05,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-18 19:39:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-12-18 19:39:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-12-18 19:39:05,025 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2021-12-18 19:39:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:05,025 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-12-18 19:39:05,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-12-18 19:39:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:39:05,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:05,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:05,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:39:05,026 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-18 19:39:05,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:05,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412003517] [2021-12-18 19:39:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:05,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:05,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:05,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412003517] [2021-12-18 19:39:05,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412003517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:05,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:05,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:39:05,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521626748] [2021-12-18 19:39:05,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:05,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:39:05,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:05,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:39:05,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:39:05,045 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:05,062 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-12-18 19:39:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:39:05,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:39:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:05,063 INFO L225 Difference]: With dead ends: 63 [2021-12-18 19:39:05,063 INFO L226 Difference]: Without dead ends: 63 [2021-12-18 19:39:05,064 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 [2021-12-18 19:39:05,064 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:05,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-18 19:39:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-18 19:39:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 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) [2021-12-18 19:39:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-18 19:39:05,067 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2021-12-18 19:39:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:05,068 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-18 19:39:05,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-18 19:39:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:39:05,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:05,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:05,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:39:05,069 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:05,069 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-18 19:39:05,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:05,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093113234] [2021-12-18 19:39:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:05,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:05,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:05,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093113234] [2021-12-18 19:39:05,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093113234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:05,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:05,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:39:05,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5230125] [2021-12-18 19:39:05,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:05,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:39:05,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:05,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:39:05,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:39:05,113 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:05,165 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-12-18 19:39:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:39:05,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:39:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:05,166 INFO L225 Difference]: With dead ends: 98 [2021-12-18 19:39:05,166 INFO L226 Difference]: Without dead ends: 98 [2021-12-18 19:39:05,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:39:05,167 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:05,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 94 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-18 19:39:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-12-18 19:39:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-12-18 19:39:05,170 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2021-12-18 19:39:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:05,171 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-12-18 19:39:05,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-12-18 19:39:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:39:05,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:05,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:05,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 19:39:05,172 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:05,172 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-18 19:39:05,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:05,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678404154] [2021-12-18 19:39:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:05,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:05,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:05,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678404154] [2021-12-18 19:39:05,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678404154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:05,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:05,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:39:05,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117197538] [2021-12-18 19:39:05,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:05,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:39:05,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:05,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:39:05,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:39:05,202 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:05,221 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-12-18 19:39:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:39:05,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-18 19:39:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:05,222 INFO L225 Difference]: With dead ends: 64 [2021-12-18 19:39:05,222 INFO L226 Difference]: Without dead ends: 64 [2021-12-18 19:39:05,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:39:05,223 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:05,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-18 19:39:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-18 19:39:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-12-18 19:39:05,226 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2021-12-18 19:39:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:05,226 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-12-18 19:39:05,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-12-18 19:39:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:39:05,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:05,227 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:05,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 19:39:05,227 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:05,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:05,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-18 19:39:05,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:05,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661069981] [2021-12-18 19:39:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:05,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:05,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661069981] [2021-12-18 19:39:05,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661069981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:05,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961169335] [2021-12-18 19:39:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:05,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:05,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:05,293 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) [2021-12-18 19:39:05,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:39:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:39:05,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:05,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-12-18 19:39:05,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:39:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:05,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:05,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961169335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:05,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:05,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-18 19:39:05,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094543514] [2021-12-18 19:39:05,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:05,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:39:05,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:39:05,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:39:05,614 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2021-12-18 19:39:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:05,751 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2021-12-18 19:39:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:39:05,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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 11 [2021-12-18 19:39:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:05,752 INFO L225 Difference]: With dead ends: 149 [2021-12-18 19:39:05,752 INFO L226 Difference]: Without dead ends: 149 [2021-12-18 19:39:05,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:39:05,752 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 248 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:05,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 278 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:39:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-18 19:39:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2021-12-18 19:39:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-12-18 19:39:05,755 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2021-12-18 19:39:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:05,755 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-12-18 19:39:05,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2021-12-18 19:39:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-12-18 19:39:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 19:39:05,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:05,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:05,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:05,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:05,972 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2021-12-18 19:39:05,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:05,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311282604] [2021-12-18 19:39:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:05,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:05,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:05,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311282604] [2021-12-18 19:39:05,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311282604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:05,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:05,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:39:05,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638853165] [2021-12-18 19:39:06,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:06,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:39:06,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:39:06,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:39:06,001 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:06,037 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-18 19:39:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:39:06,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-18 19:39:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:06,037 INFO L225 Difference]: With dead ends: 57 [2021-12-18 19:39:06,038 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:39:06,038 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 [2021-12-18 19:39:06,038 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:06,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:39:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-18 19:39:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-18 19:39:06,040 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2021-12-18 19:39:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-18 19:39:06,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-18 19:39:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 19:39:06,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:06,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:06,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 19:39:06,043 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:06,044 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-12-18 19:39:06,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:06,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569338115] [2021-12-18 19:39:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:06,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:06,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:06,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569338115] [2021-12-18 19:39:06,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569338115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:06,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:06,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:39:06,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768195207] [2021-12-18 19:39:06,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:06,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:39:06,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:06,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:39:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:39:06,123 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:06,171 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-12-18 19:39:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:39:06,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-18 19:39:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:06,172 INFO L225 Difference]: With dead ends: 80 [2021-12-18 19:39:06,172 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 19:39:06,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:39:06,172 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 161 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 65 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 [2021-12-18 19:39:06,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 65 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 19:39:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-12-18 19:39:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.42) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-12-18 19:39:06,174 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2021-12-18 19:39:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:06,174 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-12-18 19:39:06,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,174 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-12-18 19:39:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:39:06,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:06,175 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:06,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 19:39:06,175 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:06,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:06,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-18 19:39:06,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:06,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541256827] [2021-12-18 19:39:06,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:06,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:06,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:06,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541256827] [2021-12-18 19:39:06,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541256827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:06,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071298645] [2021-12-18 19:39:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:06,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:06,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:06,222 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) [2021-12-18 19:39:06,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:39:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:06,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:39:06,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:06,281 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:06,281 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:06,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:06,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071298645] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:06,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:06,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-18 19:39:06,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793860666] [2021-12-18 19:39:06,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:06,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:39:06,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:39:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:39:06,459 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:06,576 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2021-12-18 19:39:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:39:06,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:39:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:06,577 INFO L225 Difference]: With dead ends: 124 [2021-12-18 19:39:06,578 INFO L226 Difference]: Without dead ends: 124 [2021-12-18 19:39:06,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:39:06,578 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 175 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:06,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 221 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:39:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-18 19:39:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 57. [2021-12-18 19:39:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-18 19:39:06,580 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2021-12-18 19:39:06,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:06,581 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-18 19:39:06,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-18 19:39:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:39:06,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:06,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:06,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:06,791 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,SelfDestructingSolverStorable11 [2021-12-18 19:39:06,791 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:06,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2021-12-18 19:39:06,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:06,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640784148] [2021-12-18 19:39:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:06,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:06,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:06,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640784148] [2021-12-18 19:39:06,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640784148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:06,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:06,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:39:06,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869993342] [2021-12-18 19:39:06,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:06,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:39:06,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:39:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:39:06,861 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2021-12-18 19:39:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:06,883 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-18 19:39:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:39:06,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 [2021-12-18 19:39:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:06,884 INFO L225 Difference]: With dead ends: 56 [2021-12-18 19:39:06,884 INFO L226 Difference]: Without dead ends: 53 [2021-12-18 19:39:06,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:39:06,884 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 73 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:06,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 66 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-18 19:39:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-18 19:39:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-18 19:39:06,886 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2021-12-18 19:39:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:06,887 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-18 19:39:06,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2021-12-18 19:39:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-18 19:39:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:39:06,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:06,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:06,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 19:39:06,888 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2021-12-18 19:39:06,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:06,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617602547] [2021-12-18 19:39:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:06,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:06,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:06,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617602547] [2021-12-18 19:39:06,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617602547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:06,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:06,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:39:06,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55052399] [2021-12-18 19:39:06,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:06,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:39:06,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:39:06,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:39:06,926 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2021-12-18 19:39:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:06,957 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-18 19:39:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:39:06,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 [2021-12-18 19:39:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:06,958 INFO L225 Difference]: With dead ends: 50 [2021-12-18 19:39:06,958 INFO L226 Difference]: Without dead ends: 50 [2021-12-18 19:39:06,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:39:06,959 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:06,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-18 19:39:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-18 19:39:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-12-18 19:39:06,964 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2021-12-18 19:39:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:06,964 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-12-18 19:39:06,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2021-12-18 19:39:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-12-18 19:39:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:39:06,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:06,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:06,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 19:39:06,967 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:06,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:06,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2021-12-18 19:39:06,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:06,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904076415] [2021-12-18 19:39:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:06,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:07,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:07,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904076415] [2021-12-18 19:39:07,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904076415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:07,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:07,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:39:07,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376281163] [2021-12-18 19:39:07,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:07,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:39:07,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:07,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:39:07,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:39:07,034 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-12-18 19:39:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:07,089 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-12-18 19:39:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:39:07,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-12-18 19:39:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:07,090 INFO L225 Difference]: With dead ends: 62 [2021-12-18 19:39:07,090 INFO L226 Difference]: Without dead ends: 62 [2021-12-18 19:39:07,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:39:07,092 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:07,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-18 19:39:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-12-18 19:39:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-18 19:39:07,094 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2021-12-18 19:39:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:07,094 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-18 19:39:07,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-12-18 19:39:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-18 19:39:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 19:39:07,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:07,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:07,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 19:39:07,095 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2021-12-18 19:39:07,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:07,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993533481] [2021-12-18 19:39:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:07,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:07,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:07,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993533481] [2021-12-18 19:39:07,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993533481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:07,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:07,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:39:07,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402330100] [2021-12-18 19:39:07,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:07,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:39:07,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:07,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:39:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:39:07,119 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:07,124 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-12-18 19:39:07,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:39:07,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-18 19:39:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:07,124 INFO L225 Difference]: With dead ends: 59 [2021-12-18 19:39:07,124 INFO L226 Difference]: Without dead ends: 59 [2021-12-18 19:39:07,125 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 [2021-12-18 19:39:07,125 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:07,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-18 19:39:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-18 19:39:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-12-18 19:39:07,129 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2021-12-18 19:39:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:07,129 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-12-18 19:39:07,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-12-18 19:39:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 19:39:07,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:07,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:07,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-18 19:39:07,130 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2021-12-18 19:39:07,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:07,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633585209] [2021-12-18 19:39:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:07,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:07,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:07,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633585209] [2021-12-18 19:39:07,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633585209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:07,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:07,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 19:39:07,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025171434] [2021-12-18 19:39:07,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:07,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:39:07,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:39:07,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:39:07,227 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:07,299 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-12-18 19:39:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:39:07,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-18 19:39:07,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:07,300 INFO L225 Difference]: With dead ends: 71 [2021-12-18 19:39:07,300 INFO L226 Difference]: Without dead ends: 54 [2021-12-18 19:39:07,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:39:07,301 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:07,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 185 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-18 19:39:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-18 19:39:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-18 19:39:07,302 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2021-12-18 19:39:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:07,303 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-18 19:39:07,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-18 19:39:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 19:39:07,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:07,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:07,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 19:39:07,304 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2021-12-18 19:39:07,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:07,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367095584] [2021-12-18 19:39:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:07,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:07,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:07,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367095584] [2021-12-18 19:39:07,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367095584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:07,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:07,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 19:39:07,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009431795] [2021-12-18 19:39:07,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:07,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:39:07,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:07,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:39:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:39:07,407 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:07,471 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-12-18 19:39:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:39:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-18 19:39:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:07,472 INFO L225 Difference]: With dead ends: 74 [2021-12-18 19:39:07,472 INFO L226 Difference]: Without dead ends: 62 [2021-12-18 19:39:07,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:39:07,472 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:07,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 137 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:07,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-18 19:39:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-12-18 19:39:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-12-18 19:39:07,474 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2021-12-18 19:39:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:07,474 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-12-18 19:39:07,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,474 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-12-18 19:39:07,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 19:39:07,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:07,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:07,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-18 19:39:07,474 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:07,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2021-12-18 19:39:07,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:07,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293486380] [2021-12-18 19:39:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:07,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:07,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:07,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293486380] [2021-12-18 19:39:07,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293486380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:07,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:07,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 19:39:07,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835996067] [2021-12-18 19:39:07,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:07,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:39:07,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:07,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:39:07,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:39:07,573 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:07,662 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-12-18 19:39:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:39:07,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-18 19:39:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:07,663 INFO L225 Difference]: With dead ends: 75 [2021-12-18 19:39:07,664 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 19:39:07,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:39:07,664 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:07,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 187 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:39:07,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 19:39:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-12-18 19:39:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 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) [2021-12-18 19:39:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-12-18 19:39:07,666 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2021-12-18 19:39:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:07,667 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-12-18 19:39:07,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-12-18 19:39:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 19:39:07,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:07,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:07,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-18 19:39:07,669 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:07,670 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2021-12-18 19:39:07,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:07,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864492476] [2021-12-18 19:39:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:07,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:07,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:07,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864492476] [2021-12-18 19:39:07,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864492476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:07,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:07,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 19:39:07,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746851543] [2021-12-18 19:39:07,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:07,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:39:07,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:39:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:39:07,789 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:07,920 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2021-12-18 19:39:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:39:07,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-18 19:39:07,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:07,922 INFO L225 Difference]: With dead ends: 96 [2021-12-18 19:39:07,922 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 19:39:07,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:39:07,923 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 109 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:07,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 199 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:39:07,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 19:39:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2021-12-18 19:39:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2021-12-18 19:39:07,928 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2021-12-18 19:39:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:07,928 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2021-12-18 19:39:07,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2021-12-18 19:39:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 19:39:07,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:07,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:07,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-18 19:39:07,929 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:07,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2021-12-18 19:39:07,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:07,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324206580] [2021-12-18 19:39:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:07,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:07,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:07,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324206580] [2021-12-18 19:39:07,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324206580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:39:07,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:39:07,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 19:39:08,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069159994] [2021-12-18 19:39:08,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:39:08,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:39:08,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:08,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:39:08,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:39:08,001 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:08,117 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-12-18 19:39:08,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:39:08,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-18 19:39:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:08,118 INFO L225 Difference]: With dead ends: 75 [2021-12-18 19:39:08,118 INFO L226 Difference]: Without dead ends: 51 [2021-12-18 19:39:08,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-18 19:39:08,120 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:08,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 157 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:39:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-18 19:39:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-12-18 19:39:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-12-18 19:39:08,122 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 27 [2021-12-18 19:39:08,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:08,122 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-12-18 19:39:08,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-12-18 19:39:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 19:39:08,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:08,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:08,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-18 19:39:08,123 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2021-12-18 19:39:08,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:08,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84220655] [2021-12-18 19:39:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:08,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:08,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84220655] [2021-12-18 19:39:08,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84220655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954925945] [2021-12-18 19:39:08,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:08,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:08,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:08,244 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) [2021-12-18 19:39:08,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:39:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 19:39:08,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:08,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:08,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:39:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:08,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954925945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:08,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:08,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2021-12-18 19:39:08,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927383651] [2021-12-18 19:39:08,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:08,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 19:39:08,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:08,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 19:39:08,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:39:08,550 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:08,677 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-12-18 19:39:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:39:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-18 19:39:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:08,679 INFO L225 Difference]: With dead ends: 69 [2021-12-18 19:39:08,679 INFO L226 Difference]: Without dead ends: 65 [2021-12-18 19:39:08,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-12-18 19:39:08,680 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 333 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:08,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 170 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:39:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-18 19:39:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-12-18 19:39:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-12-18 19:39:08,681 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 30 [2021-12-18 19:39:08,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:08,681 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-12-18 19:39:08,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-12-18 19:39:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 19:39:08,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:08,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:08,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:08,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:08,882 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash 36573013, now seen corresponding path program 1 times [2021-12-18 19:39:08,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:08,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909293855] [2021-12-18 19:39:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:08,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:08,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:08,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909293855] [2021-12-18 19:39:08,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909293855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:08,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063420863] [2021-12-18 19:39:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:08,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:08,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:08,944 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) [2021-12-18 19:39:08,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:39:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:08,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 19:39:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:09,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:09,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-12-18 19:39:09,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:39:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:09,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:09,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063420863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:09,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:09,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2021-12-18 19:39:09,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791327786] [2021-12-18 19:39:09,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:09,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 19:39:09,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 19:39:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-18 19:39:09,386 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 17 states, 16 states have (on average 5.0) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:09,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:09,568 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-12-18 19:39:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:39:09,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.0) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-18 19:39:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:09,569 INFO L225 Difference]: With dead ends: 86 [2021-12-18 19:39:09,569 INFO L226 Difference]: Without dead ends: 86 [2021-12-18 19:39:09,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:39:09,570 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 280 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:09,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 186 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:39:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-18 19:39:09,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2021-12-18 19:39:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-12-18 19:39:09,571 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2021-12-18 19:39:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:09,571 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-12-18 19:39:09,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.0) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:09,571 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-12-18 19:39:09,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 19:39:09,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:09,572 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-18 19:39:09,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:09,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:09,783 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2021-12-18 19:39:09,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:09,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961790349] [2021-12-18 19:39:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:09,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:09,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:09,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961790349] [2021-12-18 19:39:09,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961790349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:09,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359314560] [2021-12-18 19:39:09,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:39:09,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:09,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:09,923 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) [2021-12-18 19:39:09,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:39:09,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:39:09,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 19:39:09,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:09,996 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:09,997 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:10,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:10,685 INFO L354 Elim1Store]: treesize reduction 3, result has 72.7 percent of original size [2021-12-18 19:39:10,686 INFO L388 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 19 treesize of output 16 [2021-12-18 19:39:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:10,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:11,097 INFO L388 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 13 [2021-12-18 19:39:11,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:39:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:11,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359314560] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:11,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:11,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 38 [2021-12-18 19:39:11,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489852949] [2021-12-18 19:39:11,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:11,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 19:39:11,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:11,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 19:39:11,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 19:39:11,390 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 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) [2021-12-18 19:39:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:12,318 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2021-12-18 19:39:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:39:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 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 36 [2021-12-18 19:39:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:12,320 INFO L225 Difference]: With dead ends: 107 [2021-12-18 19:39:12,320 INFO L226 Difference]: Without dead ends: 104 [2021-12-18 19:39:12,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=372, Invalid=2819, Unknown=1, NotChecked=0, Total=3192 [2021-12-18 19:39:12,321 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 175 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:12,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 435 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 215 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2021-12-18 19:39:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-18 19:39:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2021-12-18 19:39:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 90 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-12-18 19:39:12,323 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 36 [2021-12-18 19:39:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:12,323 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-12-18 19:39:12,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 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) [2021-12-18 19:39:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-12-18 19:39:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 19:39:12,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:12,324 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-12-18 19:39:12,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:12,524 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,SelfDestructingSolverStorable23 [2021-12-18 19:39:12,524 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:12,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 2 times [2021-12-18 19:39:12,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:12,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793092993] [2021-12-18 19:39:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:12,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:12,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:12,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793092993] [2021-12-18 19:39:12,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793092993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:12,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15184120] [2021-12-18 19:39:12,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:39:12,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:12,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:12,684 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) [2021-12-18 19:39:12,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:39:12,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:39:12,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-18 19:39:12,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:12,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:39:12,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:12,931 INFO L388 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 17 treesize of output 19 [2021-12-18 19:39:14,126 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-18 19:39:14,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 20 [2021-12-18 19:39:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:14,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:14,636 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_299 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_299) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) (.cse1 (select v_ArrVal_299 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= 0 .cse0) (not (= .cse1 .cse0)) (not (= .cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)))))))) is different from false [2021-12-18 19:39:14,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:14,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 50 [2021-12-18 19:39:14,658 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-12-18 19:39:14,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 88 [2021-12-18 19:39:14,673 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-12-18 19:39:14,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 60 treesize of output 62 [2021-12-18 19:39:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:14,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15184120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:14,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:14,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19, 20] total 45 [2021-12-18 19:39:14,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804440888] [2021-12-18 19:39:14,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:14,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 19:39:14,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:14,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 19:39:14,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1723, Unknown=1, NotChecked=84, Total=1980 [2021-12-18 19:39:14,951 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:16,145 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2021-12-18 19:39:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:39:16,146 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 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 [2021-12-18 19:39:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:16,146 INFO L225 Difference]: With dead ends: 164 [2021-12-18 19:39:16,146 INFO L226 Difference]: Without dead ends: 141 [2021-12-18 19:39:16,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=490, Invalid=3173, Unknown=1, NotChecked=118, Total=3782 [2021-12-18 19:39:16,148 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 266 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:16,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 457 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 388 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2021-12-18 19:39:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-18 19:39:16,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2021-12-18 19:39:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 136 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2021-12-18 19:39:16,151 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 46 [2021-12-18 19:39:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:16,151 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2021-12-18 19:39:16,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2021-12-18 19:39:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 19:39:16,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:16,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-12-18 19:39:16,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-18 19:39:16,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:16,375 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1006205749, now seen corresponding path program 3 times [2021-12-18 19:39:16,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:16,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126677721] [2021-12-18 19:39:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:16,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:16,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126677721] [2021-12-18 19:39:16,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126677721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101834153] [2021-12-18 19:39:16,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:39:16,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:16,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:16,486 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) [2021-12-18 19:39:16,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:39:16,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 19:39:16,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:16,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 19:39:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:16,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:39:16,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-12-18 19:39:16,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:16,715 INFO L388 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 17 treesize of output 19 [2021-12-18 19:39:17,517 INFO L354 Elim1Store]: treesize reduction 1, result has 97.4 percent of original size [2021-12-18 19:39:17,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-12-18 19:39:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 19:39:17,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:18,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:18,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2021-12-18 19:39:18,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:18,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2021-12-18 19:39:18,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:18,578 INFO L388 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 64 treesize of output 62 [2021-12-18 19:39:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 19:39:19,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101834153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:19,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:19,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 32 [2021-12-18 19:39:19,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212414073] [2021-12-18 19:39:19,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:19,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 19:39:19,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:19,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 19:39:19,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=909, Unknown=9, NotChecked=0, Total=1056 [2021-12-18 19:39:19,465 INFO L87 Difference]: Start difference. First operand 137 states and 150 transitions. Second operand has 33 states, 32 states have (on average 4.0625) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:20,245 INFO L93 Difference]: Finished difference Result 167 states and 182 transitions. [2021-12-18 19:39:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:39:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.0625) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-18 19:39:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:20,246 INFO L225 Difference]: With dead ends: 167 [2021-12-18 19:39:20,247 INFO L226 Difference]: Without dead ends: 167 [2021-12-18 19:39:20,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=482, Invalid=2701, Unknown=9, NotChecked=0, Total=3192 [2021-12-18 19:39:20,248 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:20,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 314 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2021-12-18 19:39:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-18 19:39:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2021-12-18 19:39:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 148 states have (on average 1.1081081081081081) internal successors, (164), 149 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2021-12-18 19:39:20,251 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 50 [2021-12-18 19:39:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:20,251 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2021-12-18 19:39:20,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.0625) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2021-12-18 19:39:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:39:20,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:20,252 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:20,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:20,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:20,453 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:20,454 INFO L85 PathProgramCache]: Analyzing trace with hash 216836651, now seen corresponding path program 3 times [2021-12-18 19:39:20,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:20,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376401778] [2021-12-18 19:39:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:20,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:20,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:20,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376401778] [2021-12-18 19:39:20,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376401778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:20,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262351455] [2021-12-18 19:39:20,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:39:20,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:20,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:20,616 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) [2021-12-18 19:39:20,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:39:20,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 19:39:20,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:20,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:39:20,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:20,761 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:20,761 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:21,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:21,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262351455] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:21,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:21,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2021-12-18 19:39:21,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312252153] [2021-12-18 19:39:21,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:21,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 19:39:21,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 19:39:21,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-12-18 19:39:21,316 INFO L87 Difference]: Start difference. First operand 150 states and 164 transitions. Second operand has 30 states, 30 states have (on average 4.333333333333333) internal successors, (130), 30 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:21,748 INFO L93 Difference]: Finished difference Result 332 states and 355 transitions. [2021-12-18 19:39:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:39:21,748 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.333333333333333) internal successors, (130), 30 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-18 19:39:21,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:21,749 INFO L225 Difference]: With dead ends: 332 [2021-12-18 19:39:21,749 INFO L226 Difference]: Without dead ends: 305 [2021-12-18 19:39:21,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 19:39:21,750 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 367 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:21,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 482 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:39:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-18 19:39:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 226. [2021-12-18 19:39:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.1116071428571428) internal successors, (249), 225 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 249 transitions. [2021-12-18 19:39:21,760 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 249 transitions. Word has length 52 [2021-12-18 19:39:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:21,760 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 249 transitions. [2021-12-18 19:39:21,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.333333333333333) internal successors, (130), 30 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 249 transitions. [2021-12-18 19:39:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 19:39:21,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:21,762 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-18 19:39:21,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:21,984 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,SelfDestructingSolverStorable26 [2021-12-18 19:39:21,987 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1672384838, now seen corresponding path program 1 times [2021-12-18 19:39:21,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:21,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372736918] [2021-12-18 19:39:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:21,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:22,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:22,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372736918] [2021-12-18 19:39:22,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372736918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:22,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064438362] [2021-12-18 19:39:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:22,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:22,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:22,112 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) [2021-12-18 19:39:22,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 19:39:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 19:39:22,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:22,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:24,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:24,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:24,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:24,794 INFO L354 Elim1Store]: treesize reduction 30, result has 30.2 percent of original size [2021-12-18 19:39:24,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 26 [2021-12-18 19:39:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:39:24,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:25,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:25,216 INFO L388 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 102 treesize of output 100 [2021-12-18 19:39:25,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-18 19:39:25,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:25,241 INFO L388 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 45 treesize of output 49 [2021-12-18 19:39:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:39:25,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064438362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:25,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:25,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 43 [2021-12-18 19:39:25,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339173706] [2021-12-18 19:39:25,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:25,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 19:39:25,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 19:39:25,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1597, Unknown=1, NotChecked=0, Total=1806 [2021-12-18 19:39:25,444 INFO L87 Difference]: Start difference. First operand 226 states and 249 transitions. Second operand has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 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) [2021-12-18 19:39:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:29,107 INFO L93 Difference]: Finished difference Result 243 states and 266 transitions. [2021-12-18 19:39:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:39:29,107 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 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 53 [2021-12-18 19:39:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:29,108 INFO L225 Difference]: With dead ends: 243 [2021-12-18 19:39:29,108 INFO L226 Difference]: Without dead ends: 213 [2021-12-18 19:39:29,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=510, Invalid=3028, Unknown=2, NotChecked=0, Total=3540 [2021-12-18 19:39:29,109 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 88 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:29,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 507 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2021-12-18 19:39:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-18 19:39:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-12-18 19:39:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 211 states have (on average 1.113744075829384) internal successors, (235), 212 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 235 transitions. [2021-12-18 19:39:29,112 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 235 transitions. Word has length 53 [2021-12-18 19:39:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:29,112 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 235 transitions. [2021-12-18 19:39:29,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 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) [2021-12-18 19:39:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 235 transitions. [2021-12-18 19:39:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 19:39:29,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:29,113 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:29,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:29,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 19:39:29,313 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:29,313 INFO L85 PathProgramCache]: Analyzing trace with hash 509273480, now seen corresponding path program 4 times [2021-12-18 19:39:29,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:29,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907020699] [2021-12-18 19:39:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:29,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:29,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:29,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907020699] [2021-12-18 19:39:29,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907020699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:29,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849772567] [2021-12-18 19:39:29,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:39:29,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:29,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:29,516 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) [2021-12-18 19:39:29,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 19:39:29,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:39:29,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:29,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 19:39:29,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:29,609 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:29,610 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:29,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:39:30,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:30,186 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 19:39:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:30,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:30,571 INFO L388 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 13 treesize of output 11 [2021-12-18 19:39:30,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:39:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:30,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849772567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:30,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:30,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2021-12-18 19:39:30,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899103910] [2021-12-18 19:39:30,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:30,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 19:39:30,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:30,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 19:39:30,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:39:30,983 INFO L87 Difference]: Start difference. First operand 213 states and 235 transitions. Second operand has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:31,566 INFO L93 Difference]: Finished difference Result 288 states and 313 transitions. [2021-12-18 19:39:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:39:31,566 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 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 56 [2021-12-18 19:39:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:31,567 INFO L225 Difference]: With dead ends: 288 [2021-12-18 19:39:31,567 INFO L226 Difference]: Without dead ends: 257 [2021-12-18 19:39:31,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=409, Invalid=3251, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:39:31,569 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 143 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:31,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 591 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 315 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2021-12-18 19:39:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-18 19:39:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 246. [2021-12-18 19:39:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 244 states have (on average 1.110655737704918) internal successors, (271), 245 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 271 transitions. [2021-12-18 19:39:31,590 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 271 transitions. Word has length 56 [2021-12-18 19:39:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:31,590 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 271 transitions. [2021-12-18 19:39:31,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 271 transitions. [2021-12-18 19:39:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 19:39:31,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:31,591 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-12-18 19:39:31,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:31,808 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,SelfDestructingSolverStorable28 [2021-12-18 19:39:31,808 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1104896393, now seen corresponding path program 2 times [2021-12-18 19:39:31,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:31,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614658895] [2021-12-18 19:39:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:31,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:31,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614658895] [2021-12-18 19:39:31,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614658895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597124270] [2021-12-18 19:39:31,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:39:31,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:31,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:31,908 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) [2021-12-18 19:39:31,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 19:39:31,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:39:31,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:31,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 19:39:31,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:32,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:32,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:39:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:32,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597124270] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:32,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:32,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2021-12-18 19:39:32,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969726651] [2021-12-18 19:39:32,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:32,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 19:39:32,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:32,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 19:39:32,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:39:32,365 INFO L87 Difference]: Start difference. First operand 246 states and 271 transitions. Second operand has 23 states, 22 states have (on average 5.636363636363637) internal successors, (124), 23 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) [2021-12-18 19:39:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:32,657 INFO L93 Difference]: Finished difference Result 297 states and 325 transitions. [2021-12-18 19:39:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:39:32,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.636363636363637) internal successors, (124), 23 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) Word has length 57 [2021-12-18 19:39:32,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:32,658 INFO L225 Difference]: With dead ends: 297 [2021-12-18 19:39:32,658 INFO L226 Difference]: Without dead ends: 297 [2021-12-18 19:39:32,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-12-18 19:39:32,659 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 332 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:32,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 268 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:39:32,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-18 19:39:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 252. [2021-12-18 19:39:32,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 250 states have (on average 1.108) internal successors, (277), 251 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 277 transitions. [2021-12-18 19:39:32,663 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 277 transitions. Word has length 57 [2021-12-18 19:39:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:32,664 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 277 transitions. [2021-12-18 19:39:32,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.636363636363637) internal successors, (124), 23 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) [2021-12-18 19:39:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 277 transitions. [2021-12-18 19:39:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 19:39:32,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:32,665 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:32,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:32,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:32,876 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash 223488613, now seen corresponding path program 5 times [2021-12-18 19:39:32,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:32,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397748188] [2021-12-18 19:39:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:32,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:33,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:33,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397748188] [2021-12-18 19:39:33,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397748188] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:33,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695387515] [2021-12-18 19:39:33,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:39:33,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:33,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:33,041 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) [2021-12-18 19:39:33,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 19:39:33,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-18 19:39:33,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:33,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 19:39:33,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:33,137 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:33,138 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:33,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:33,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695387515] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:33,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:33,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2021-12-18 19:39:33,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652680997] [2021-12-18 19:39:33,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:33,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 19:39:33,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 19:39:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:39:33,894 INFO L87 Difference]: Start difference. First operand 252 states and 277 transitions. Second operand has 36 states, 35 states have (on average 4.628571428571429) internal successors, (162), 36 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:34,417 INFO L93 Difference]: Finished difference Result 384 states and 416 transitions. [2021-12-18 19:39:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:39:34,417 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.628571428571429) internal successors, (162), 36 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-18 19:39:34,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:34,418 INFO L225 Difference]: With dead ends: 384 [2021-12-18 19:39:34,418 INFO L226 Difference]: Without dead ends: 384 [2021-12-18 19:39:34,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1696, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 19:39:34,419 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 382 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:34,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 590 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:39:34,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-12-18 19:39:34,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 319. [2021-12-18 19:39:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 317 states have (on average 1.113564668769716) internal successors, (353), 318 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 353 transitions. [2021-12-18 19:39:34,423 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 353 transitions. Word has length 60 [2021-12-18 19:39:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:34,423 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 353 transitions. [2021-12-18 19:39:34,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.628571428571429) internal successors, (162), 36 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 353 transitions. [2021-12-18 19:39:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 19:39:34,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:34,424 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 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] [2021-12-18 19:39:34,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:34,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:34,629 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash -662058626, now seen corresponding path program 1 times [2021-12-18 19:39:34,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:34,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497085051] [2021-12-18 19:39:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:34,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:39:34,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497085051] [2021-12-18 19:39:34,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497085051] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497762968] [2021-12-18 19:39:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:34,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:34,762 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) [2021-12-18 19:39:34,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 19:39:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:34,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 19:39:34,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:34,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:34,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-12-18 19:39:34,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:39:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:39:35,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:39:35,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497762968] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:35,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:35,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2021-12-18 19:39:35,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296272160] [2021-12-18 19:39:35,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:35,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 19:39:35,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 19:39:35,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:39:35,226 INFO L87 Difference]: Start difference. First operand 319 states and 353 transitions. Second operand has 22 states, 21 states have (on average 6.380952380952381) internal successors, (134), 22 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:35,424 INFO L93 Difference]: Finished difference Result 587 states and 649 transitions. [2021-12-18 19:39:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:39:35,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.380952380952381) internal successors, (134), 22 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-18 19:39:35,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:35,426 INFO L225 Difference]: With dead ends: 587 [2021-12-18 19:39:35,426 INFO L226 Difference]: Without dead ends: 587 [2021-12-18 19:39:35,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-12-18 19:39:35,426 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 385 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:35,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 315 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:39:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-12-18 19:39:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 447. [2021-12-18 19:39:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 445 states have (on average 1.1168539325842697) internal successors, (497), 446 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 497 transitions. [2021-12-18 19:39:35,433 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 497 transitions. Word has length 60 [2021-12-18 19:39:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:35,433 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 497 transitions. [2021-12-18 19:39:35,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.380952380952381) internal successors, (134), 22 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 497 transitions. [2021-12-18 19:39:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 19:39:35,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:35,433 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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, 1] [2021-12-18 19:39:35,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:35,647 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,SelfDestructingSolverStorable31 [2021-12-18 19:39:35,647 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash -525028771, now seen corresponding path program 3 times [2021-12-18 19:39:35,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:35,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370457408] [2021-12-18 19:39:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:35,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:39:36,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:36,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370457408] [2021-12-18 19:39:36,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370457408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:36,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949516736] [2021-12-18 19:39:36,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:39:36,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:36,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:36,050 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) [2021-12-18 19:39:36,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 19:39:36,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:39:36,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 19:39:36,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:36,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:36,397 INFO L388 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 [2021-12-18 19:39:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:36,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:36,521 INFO L388 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 13 [2021-12-18 19:39:36,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:39:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:36,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949516736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:36,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:36,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 33 [2021-12-18 19:39:36,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429677611] [2021-12-18 19:39:36,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:36,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 19:39:36,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:36,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 19:39:36,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 19:39:36,612 INFO L87 Difference]: Start difference. First operand 447 states and 497 transitions. Second operand has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:38,230 INFO L93 Difference]: Finished difference Result 858 states and 947 transitions. [2021-12-18 19:39:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 19:39:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 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 63 [2021-12-18 19:39:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:38,232 INFO L225 Difference]: With dead ends: 858 [2021-12-18 19:39:38,233 INFO L226 Difference]: Without dead ends: 840 [2021-12-18 19:39:38,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=483, Invalid=3299, Unknown=0, NotChecked=0, Total=3782 [2021-12-18 19:39:38,234 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 461 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:38,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 810 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 967 Invalid, 0 Unknown, 133 Unchecked, 0.4s Time] [2021-12-18 19:39:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-12-18 19:39:38,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 554. [2021-12-18 19:39:38,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 552 states have (on average 1.1068840579710144) internal successors, (611), 553 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 611 transitions. [2021-12-18 19:39:38,241 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 611 transitions. Word has length 63 [2021-12-18 19:39:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:38,241 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 611 transitions. [2021-12-18 19:39:38,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 611 transitions. [2021-12-18 19:39:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 19:39:38,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:38,242 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:38,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:38,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:38,443 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:38,443 INFO L85 PathProgramCache]: Analyzing trace with hash 265315897, now seen corresponding path program 6 times [2021-12-18 19:39:38,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:38,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013238235] [2021-12-18 19:39:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:38,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:38,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:38,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013238235] [2021-12-18 19:39:38,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013238235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:38,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429808550] [2021-12-18 19:39:38,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:39:38,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:38,665 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) [2021-12-18 19:39:38,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 19:39:38,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:39:38,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-18 19:39:38,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:38,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:39,076 INFO L388 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 [2021-12-18 19:39:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:39,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:39,216 INFO L388 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 13 [2021-12-18 19:39:39,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:39:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:39,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429808550] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:39,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:39,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 34 [2021-12-18 19:39:39,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038904478] [2021-12-18 19:39:39,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:39,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:39:39,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:39:39,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 19:39:39,334 INFO L87 Difference]: Start difference. First operand 554 states and 611 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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) [2021-12-18 19:39:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:39,940 INFO L93 Difference]: Finished difference Result 830 states and 904 transitions. [2021-12-18 19:39:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:39:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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 66 [2021-12-18 19:39:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:39,942 INFO L225 Difference]: With dead ends: 830 [2021-12-18 19:39:39,943 INFO L226 Difference]: Without dead ends: 787 [2021-12-18 19:39:39,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=1989, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 19:39:39,943 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 349 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:39,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 1323 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 934 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2021-12-18 19:39:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-12-18 19:39:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 655. [2021-12-18 19:39:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 653 states have (on average 1.105666156202144) internal successors, (722), 654 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 722 transitions. [2021-12-18 19:39:39,965 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 722 transitions. Word has length 66 [2021-12-18 19:39:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:39,965 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 722 transitions. [2021-12-18 19:39:39,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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) [2021-12-18 19:39:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 722 transitions. [2021-12-18 19:39:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-18 19:39:39,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:39,967 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:39,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:40,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:40,184 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:40,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1057469728, now seen corresponding path program 4 times [2021-12-18 19:39:40,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:40,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643068658] [2021-12-18 19:39:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:40,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:40,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643068658] [2021-12-18 19:39:40,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643068658] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842309543] [2021-12-18 19:39:40,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:39:40,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:40,356 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) [2021-12-18 19:39:40,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 19:39:40,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:39:40,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:40,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 19:39:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:40,459 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:40,460 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:40,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:39:40,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:40,998 INFO L388 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 19 treesize of output 19 [2021-12-18 19:39:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:41,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:41,690 INFO L388 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 13 [2021-12-18 19:39:41,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:39:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:42,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842309543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:42,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:42,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 41 [2021-12-18 19:39:42,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073059141] [2021-12-18 19:39:42,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:42,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-18 19:39:42,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:42,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-18 19:39:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 19:39:42,118 INFO L87 Difference]: Start difference. First operand 655 states and 722 transitions. Second operand has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:43,276 INFO L93 Difference]: Finished difference Result 859 states and 939 transitions. [2021-12-18 19:39:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:39:43,276 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-18 19:39:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:43,279 INFO L225 Difference]: With dead ends: 859 [2021-12-18 19:39:43,283 INFO L226 Difference]: Without dead ends: 858 [2021-12-18 19:39:43,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=942, Invalid=3750, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 19:39:43,284 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 912 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:43,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 737 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1187 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2021-12-18 19:39:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-12-18 19:39:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 548. [2021-12-18 19:39:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 546 states have (on average 1.1007326007326008) internal successors, (601), 547 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 601 transitions. [2021-12-18 19:39:43,295 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 601 transitions. Word has length 67 [2021-12-18 19:39:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:43,295 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 601 transitions. [2021-12-18 19:39:43,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 601 transitions. [2021-12-18 19:39:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 19:39:43,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:43,297 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:43,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:43,512 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,SelfDestructingSolverStorable34 [2021-12-18 19:39:43,512 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1055980246, now seen corresponding path program 7 times [2021-12-18 19:39:43,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:43,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145163361] [2021-12-18 19:39:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:43,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:43,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:43,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145163361] [2021-12-18 19:39:43,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145163361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:43,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122540152] [2021-12-18 19:39:43,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:39:43,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:43,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:43,734 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) [2021-12-18 19:39:43,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 19:39:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:43,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 19:39:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:44,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:44,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:39:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:44,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122540152] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:44,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:44,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 34 [2021-12-18 19:39:44,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579959517] [2021-12-18 19:39:44,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:44,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:39:44,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:44,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:39:44,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:39:44,526 INFO L87 Difference]: Start difference. First operand 548 states and 601 transitions. Second operand has 35 states, 34 states have (on average 4.352941176470588) internal successors, (148), 35 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:45,484 INFO L93 Difference]: Finished difference Result 880 states and 963 transitions. [2021-12-18 19:39:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:39:45,487 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.352941176470588) internal successors, (148), 35 states have internal predecessors, (148), 0 states have call successors, (0), 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 70 [2021-12-18 19:39:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:45,490 INFO L225 Difference]: With dead ends: 880 [2021-12-18 19:39:45,490 INFO L226 Difference]: Without dead ends: 880 [2021-12-18 19:39:45,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 19:39:45,491 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 644 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:45,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 1012 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:39:45,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-12-18 19:39:45,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 678. [2021-12-18 19:39:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 676 states have (on average 1.1079881656804733) internal successors, (749), 677 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 749 transitions. [2021-12-18 19:39:45,505 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 749 transitions. Word has length 70 [2021-12-18 19:39:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:45,505 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 749 transitions. [2021-12-18 19:39:45,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.352941176470588) internal successors, (148), 35 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 749 transitions. [2021-12-18 19:39:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 19:39:45,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:45,509 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:45,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:45,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:45,723 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2120159335, now seen corresponding path program 2 times [2021-12-18 19:39:45,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:45,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027552181] [2021-12-18 19:39:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:45,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:39:45,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:45,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027552181] [2021-12-18 19:39:45,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027552181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:45,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854940308] [2021-12-18 19:39:45,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:39:45,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:45,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:45,921 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) [2021-12-18 19:39:45,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 19:39:46,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:39:46,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:46,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 19:39:46,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:46,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:39:46,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:46,283 INFO L388 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 17 treesize of output 19 [2021-12-18 19:39:46,449 INFO L388 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 [2021-12-18 19:39:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:39:46,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:46,583 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_748 (Array Int Int)) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_48| Int)) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_48|) (< |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_48| 0) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_48| 2)) 0))) is different from false [2021-12-18 19:39:46,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:46,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:39:46,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:46,595 INFO L388 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 37 treesize of output 37 [2021-12-18 19:39:46,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:39:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:39:46,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854940308] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:46,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:46,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 31 [2021-12-18 19:39:46,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058360577] [2021-12-18 19:39:46,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:46,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:39:46,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:46,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:39:46,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=773, Unknown=1, NotChecked=56, Total=930 [2021-12-18 19:39:46,980 INFO L87 Difference]: Start difference. First operand 678 states and 749 transitions. Second operand has 31 states, 31 states have (on average 4.225806451612903) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:47,234 INFO L93 Difference]: Finished difference Result 922 states and 1012 transitions. [2021-12-18 19:39:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:39:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.225806451612903) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 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 73 [2021-12-18 19:39:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:47,237 INFO L225 Difference]: With dead ends: 922 [2021-12-18 19:39:47,237 INFO L226 Difference]: Without dead ends: 805 [2021-12-18 19:39:47,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=1197, Unknown=1, NotChecked=72, Total=1482 [2021-12-18 19:39:47,238 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 265 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:47,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 757 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 408 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2021-12-18 19:39:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-12-18 19:39:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 695. [2021-12-18 19:39:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 693 states have (on average 1.1125541125541125) internal successors, (771), 694 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 771 transitions. [2021-12-18 19:39:47,251 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 771 transitions. Word has length 73 [2021-12-18 19:39:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:47,251 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 771 transitions. [2021-12-18 19:39:47,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.225806451612903) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 771 transitions. [2021-12-18 19:39:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-18 19:39:47,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:47,253 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:47,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:47,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:47,467 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2092129770, now seen corresponding path program 8 times [2021-12-18 19:39:47,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:47,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766904311] [2021-12-18 19:39:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:47,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:47,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:47,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766904311] [2021-12-18 19:39:47,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766904311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:47,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037412605] [2021-12-18 19:39:47,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:39:47,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:47,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:47,642 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:47,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 19:39:47,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:39:47,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:47,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 19:39:47,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:47,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:48,314 INFO L388 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 [2021-12-18 19:39:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:48,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:48,504 INFO L388 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 13 [2021-12-18 19:39:48,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:39:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:48,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037412605] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:48,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:48,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 50 [2021-12-18 19:39:48,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021972888] [2021-12-18 19:39:48,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:48,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 19:39:48,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 19:39:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 19:39:48,902 INFO L87 Difference]: Start difference. First operand 695 states and 771 transitions. Second operand has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:49,795 INFO L93 Difference]: Finished difference Result 1211 states and 1320 transitions. [2021-12-18 19:39:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:39:49,796 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 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 76 [2021-12-18 19:39:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:49,798 INFO L225 Difference]: With dead ends: 1211 [2021-12-18 19:39:49,798 INFO L226 Difference]: Without dead ends: 1097 [2021-12-18 19:39:49,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=482, Invalid=3940, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:39:49,799 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 606 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:49,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 2344 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1870 Invalid, 0 Unknown, 250 Unchecked, 0.5s Time] [2021-12-18 19:39:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-12-18 19:39:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 848. [2021-12-18 19:39:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 846 states have (on average 1.1111111111111112) internal successors, (940), 847 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 940 transitions. [2021-12-18 19:39:49,807 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 940 transitions. Word has length 76 [2021-12-18 19:39:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:49,807 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 940 transitions. [2021-12-18 19:39:49,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 940 transitions. [2021-12-18 19:39:49,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 19:39:49,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:49,810 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:49,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:50,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:50,048 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2129461782, now seen corresponding path program 3 times [2021-12-18 19:39:50,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:50,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416478269] [2021-12-18 19:39:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:50,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:39:50,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:50,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416478269] [2021-12-18 19:39:50,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416478269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:50,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384803885] [2021-12-18 19:39:50,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:39:50,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:50,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:50,155 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:50,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 19:39:50,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:39:50,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 19:39:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:50,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-12-18 19:39:50,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:39:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:39:50,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:39:51,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384803885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:51,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:51,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2021-12-18 19:39:51,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437879931] [2021-12-18 19:39:51,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:51,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 19:39:51,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:51,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 19:39:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-12-18 19:39:51,198 INFO L87 Difference]: Start difference. First operand 848 states and 940 transitions. Second operand has 29 states, 28 states have (on average 7.0) internal successors, (196), 29 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) [2021-12-18 19:39:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:51,760 INFO L93 Difference]: Finished difference Result 1360 states and 1499 transitions. [2021-12-18 19:39:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:39:51,761 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 7.0) internal successors, (196), 29 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) Word has length 77 [2021-12-18 19:39:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:51,763 INFO L225 Difference]: With dead ends: 1360 [2021-12-18 19:39:51,763 INFO L226 Difference]: Without dead ends: 1360 [2021-12-18 19:39:51,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:39:51,764 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 533 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:51,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 587 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:39:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-12-18 19:39:51,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1075. [2021-12-18 19:39:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1073 states have (on average 1.1118359739049395) internal successors, (1193), 1074 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1193 transitions. [2021-12-18 19:39:51,797 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1193 transitions. Word has length 77 [2021-12-18 19:39:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:51,797 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1193 transitions. [2021-12-18 19:39:51,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 7.0) internal successors, (196), 29 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) [2021-12-18 19:39:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1193 transitions. [2021-12-18 19:39:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-18 19:39:51,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:51,799 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:51,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:52,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 19:39:52,033 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash -24530168, now seen corresponding path program 5 times [2021-12-18 19:39:52,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:52,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648887603] [2021-12-18 19:39:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:52,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 52 proven. 61 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:52,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:52,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648887603] [2021-12-18 19:39:52,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648887603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:52,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444919875] [2021-12-18 19:39:52,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:39:52,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:52,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:52,175 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:52,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 19:39:52,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-18 19:39:52,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:52,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:39:52,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:52,312 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:52,312 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:52,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:39:53,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444919875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:53,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:53,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 35 [2021-12-18 19:39:53,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133953328] [2021-12-18 19:39:53,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:53,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:39:53,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:53,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:39:53,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:39:53,011 INFO L87 Difference]: Start difference. First operand 1075 states and 1193 transitions. Second operand has 35 states, 35 states have (on average 5.228571428571429) internal successors, (183), 35 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:53,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:53,395 INFO L93 Difference]: Finished difference Result 1347 states and 1475 transitions. [2021-12-18 19:39:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:39:53,396 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.228571428571429) internal successors, (183), 35 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-18 19:39:53,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:53,398 INFO L225 Difference]: With dead ends: 1347 [2021-12-18 19:39:53,398 INFO L226 Difference]: Without dead ends: 1277 [2021-12-18 19:39:53,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 19:39:53,399 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 387 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:53,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 574 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:39:53,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-12-18 19:39:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1177. [2021-12-18 19:39:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1175 states have (on average 1.1106382978723404) internal successors, (1305), 1176 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1305 transitions. [2021-12-18 19:39:53,415 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1305 transitions. Word has length 79 [2021-12-18 19:39:53,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:53,416 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 1305 transitions. [2021-12-18 19:39:53,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.228571428571429) internal successors, (183), 35 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1305 transitions. [2021-12-18 19:39:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-18 19:39:53,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:53,417 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:53,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:53,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 19:39:53,632 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash -882077113, now seen corresponding path program 9 times [2021-12-18 19:39:53,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606399097] [2021-12-18 19:39:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:53,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:53,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:53,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606399097] [2021-12-18 19:39:53,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606399097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:53,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065592392] [2021-12-18 19:39:53,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:39:53,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:53,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:53,859 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:53,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 19:39:54,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-18 19:39:54,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:54,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 19:39:54,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:54,043 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:54,044 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:54,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:55,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065592392] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:55,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:55,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 51 [2021-12-18 19:39:55,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160896657] [2021-12-18 19:39:55,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:55,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-18 19:39:55,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-18 19:39:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2325, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 19:39:55,409 INFO L87 Difference]: Start difference. First operand 1177 states and 1305 transitions. Second operand has 52 states, 51 states have (on average 4.549019607843137) internal successors, (232), 52 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:56,640 INFO L93 Difference]: Finished difference Result 1451 states and 1585 transitions. [2021-12-18 19:39:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:39:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.549019607843137) internal successors, (232), 52 states have internal predecessors, (232), 0 states have call successors, (0), 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 80 [2021-12-18 19:39:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:56,643 INFO L225 Difference]: With dead ends: 1451 [2021-12-18 19:39:56,644 INFO L226 Difference]: Without dead ends: 1451 [2021-12-18 19:39:56,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1083, Invalid=4319, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 19:39:56,644 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 763 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:56,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 1185 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:39:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-12-18 19:39:56,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1213. [2021-12-18 19:39:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1211 states have (on average 1.111478117258464) internal successors, (1346), 1212 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1346 transitions. [2021-12-18 19:39:56,657 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1346 transitions. Word has length 80 [2021-12-18 19:39:56,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:56,657 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1346 transitions. [2021-12-18 19:39:56,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.549019607843137) internal successors, (232), 52 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1346 transitions. [2021-12-18 19:39:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-18 19:39:56,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:56,658 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:56,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:56,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:56,876 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:39:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:56,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1484661605, now seen corresponding path program 10 times [2021-12-18 19:39:56,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:56,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970851840] [2021-12-18 19:39:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:56,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:57,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:57,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970851840] [2021-12-18 19:39:57,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970851840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:57,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857746927] [2021-12-18 19:39:57,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:39:57,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:57,127 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:57,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 19:39:57,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:39:57,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:57,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 19:39:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:57,253 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:57,253 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:57,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:39:58,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:58,404 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 19:39:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 121 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:58,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:59,112 INFO L388 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 13 treesize of output 11 [2021-12-18 19:39:59,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:39:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:59,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857746927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:59,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:59,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 61 [2021-12-18 19:39:59,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570095937] [2021-12-18 19:39:59,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:59,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-18 19:39:59,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:59,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-18 19:39:59,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3335, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:39:59,762 INFO L87 Difference]: Start difference. First operand 1213 states and 1346 transitions. Second operand has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 61 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:00,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:00,654 INFO L93 Difference]: Finished difference Result 1392 states and 1537 transitions. [2021-12-18 19:40:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 19:40:00,655 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 61 states have internal predecessors, (238), 0 states have call successors, (0), 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 86 [2021-12-18 19:40:00,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:00,657 INFO L225 Difference]: With dead ends: 1392 [2021-12-18 19:40:00,657 INFO L226 Difference]: Without dead ends: 1340 [2021-12-18 19:40:00,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=835, Invalid=7355, Unknown=0, NotChecked=0, Total=8190 [2021-12-18 19:40:00,659 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 134 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:00,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1792 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 867 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2021-12-18 19:40:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-12-18 19:40:00,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1311. [2021-12-18 19:40:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1309 states have (on average 1.1122994652406417) internal successors, (1456), 1310 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1456 transitions. [2021-12-18 19:40:00,672 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1456 transitions. Word has length 86 [2021-12-18 19:40:00,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:00,672 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 1456 transitions. [2021-12-18 19:40:00,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 61 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:00,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1456 transitions. [2021-12-18 19:40:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-18 19:40:00,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:00,674 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:00,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:00,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:00,891 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:00,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:00,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1004507895, now seen corresponding path program 6 times [2021-12-18 19:40:00,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:00,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675470317] [2021-12-18 19:40:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:00,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:40:01,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:01,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675470317] [2021-12-18 19:40:01,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675470317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:01,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328372355] [2021-12-18 19:40:01,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:40:01,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:01,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:01,123 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:01,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 19:40:01,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:40:01,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:01,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 19:40:01,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:01,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:01,663 INFO L388 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 [2021-12-18 19:40:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:40:01,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:01,763 INFO L388 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 13 [2021-12-18 19:40:01,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:40:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:40:01,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328372355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:01,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:01,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 34 [2021-12-18 19:40:01,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604096413] [2021-12-18 19:40:01,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:01,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:40:01,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:01,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:40:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 19:40:01,885 INFO L87 Difference]: Start difference. First operand 1311 states and 1456 transitions. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:02,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:02,339 INFO L93 Difference]: Finished difference Result 1394 states and 1526 transitions. [2021-12-18 19:40:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:40:02,340 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 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 89 [2021-12-18 19:40:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:02,348 INFO L225 Difference]: With dead ends: 1394 [2021-12-18 19:40:02,348 INFO L226 Difference]: Without dead ends: 1310 [2021-12-18 19:40:02,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=336, Invalid=2016, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:40:02,349 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 419 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:02,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 1230 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1083 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2021-12-18 19:40:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-12-18 19:40:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1050. [2021-12-18 19:40:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1048 states have (on average 1.109732824427481) internal successors, (1163), 1049 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1163 transitions. [2021-12-18 19:40:02,359 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1163 transitions. Word has length 89 [2021-12-18 19:40:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:02,359 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1163 transitions. [2021-12-18 19:40:02,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1163 transitions. [2021-12-18 19:40:02,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-18 19:40:02,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:02,361 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:02,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:02,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:02,577 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:02,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:02,577 INFO L85 PathProgramCache]: Analyzing trace with hash 777978040, now seen corresponding path program 11 times [2021-12-18 19:40:02,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:02,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986774360] [2021-12-18 19:40:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:02,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:02,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986774360] [2021-12-18 19:40:02,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986774360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860538676] [2021-12-18 19:40:02,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:40:02,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:02,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:02,832 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:02,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 19:40:02,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-18 19:40:02,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:40:02,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:03,006 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:40:03,007 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:40:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:03,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 91 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:04,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860538676] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:04,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:04,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 53 [2021-12-18 19:40:04,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858198471] [2021-12-18 19:40:04,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:04,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-18 19:40:04,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:04,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-18 19:40:04,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2477, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 19:40:04,369 INFO L87 Difference]: Start difference. First operand 1050 states and 1163 transitions. Second operand has 54 states, 53 states have (on average 4.754716981132075) internal successors, (252), 54 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:05,666 INFO L93 Difference]: Finished difference Result 1710 states and 1870 transitions. [2021-12-18 19:40:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 19:40:05,666 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.754716981132075) internal successors, (252), 54 states have internal predecessors, (252), 0 states have call successors, (0), 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 90 [2021-12-18 19:40:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:05,670 INFO L225 Difference]: With dead ends: 1710 [2021-12-18 19:40:05,670 INFO L226 Difference]: Without dead ends: 1710 [2021-12-18 19:40:05,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1105, Invalid=4297, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 19:40:05,670 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 649 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:05,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 1474 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 19:40:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-12-18 19:40:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1286. [2021-12-18 19:40:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1284 states have (on average 1.115264797507788) internal successors, (1432), 1285 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1432 transitions. [2021-12-18 19:40:05,694 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1432 transitions. Word has length 90 [2021-12-18 19:40:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:05,694 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 1432 transitions. [2021-12-18 19:40:05,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.754716981132075) internal successors, (252), 54 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1432 transitions. [2021-12-18 19:40:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-18 19:40:05,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:05,708 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:05,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-18 19:40:05,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-18 19:40:05,918 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash 318466939, now seen corresponding path program 4 times [2021-12-18 19:40:05,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:05,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080924259] [2021-12-18 19:40:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:05,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:40:06,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:06,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080924259] [2021-12-18 19:40:06,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080924259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:06,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377317715] [2021-12-18 19:40:06,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:40:06,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:06,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:06,301 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:06,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 19:40:06,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:40:06,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:06,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 19:40:06,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:06,436 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:40:06,437 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:40:06,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:40:06,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-18 19:40:06,812 INFO L388 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 16 treesize of output 18 [2021-12-18 19:40:07,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:07,166 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 19:40:07,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:40:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 97 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:07,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:07,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:07,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-18 19:40:07,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:07,549 INFO L388 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 33 treesize of output 33 [2021-12-18 19:40:07,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-18 19:40:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 92 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:07,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377317715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:07,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:07,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 44 [2021-12-18 19:40:07,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486852615] [2021-12-18 19:40:07,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:07,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 19:40:07,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:07,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 19:40:07,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1729, Unknown=4, NotChecked=0, Total=1892 [2021-12-18 19:40:07,941 INFO L87 Difference]: Start difference. First operand 1286 states and 1432 transitions. Second operand has 44 states, 44 states have (on average 4.795454545454546) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:08,811 INFO L93 Difference]: Finished difference Result 2153 states and 2382 transitions. [2021-12-18 19:40:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:40:08,811 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.795454545454546) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 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 90 [2021-12-18 19:40:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:08,814 INFO L225 Difference]: With dead ends: 2153 [2021-12-18 19:40:08,814 INFO L226 Difference]: Without dead ends: 1739 [2021-12-18 19:40:08,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=478, Invalid=4074, Unknown=4, NotChecked=0, Total=4556 [2021-12-18 19:40:08,815 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 256 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:08,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 978 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 555 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2021-12-18 19:40:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-12-18 19:40:08,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1472. [2021-12-18 19:40:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1470 states have (on average 1.117687074829932) internal successors, (1643), 1471 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 1643 transitions. [2021-12-18 19:40:08,828 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 1643 transitions. Word has length 90 [2021-12-18 19:40:08,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:08,828 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 1643 transitions. [2021-12-18 19:40:08,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.795454545454546) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 1643 transitions. [2021-12-18 19:40:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-18 19:40:08,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:08,830 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:08,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:09,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-18 19:40:09,047 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:09,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash 296080472, now seen corresponding path program 5 times [2021-12-18 19:40:09,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:09,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130683422] [2021-12-18 19:40:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:09,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:09,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:09,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130683422] [2021-12-18 19:40:09,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130683422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:09,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733624909] [2021-12-18 19:40:09,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:40:09,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:09,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:09,174 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:09,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 19:40:09,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-18 19:40:09,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:09,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-18 19:40:09,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:09,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:09,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-18 19:40:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:10,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733624909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:10,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:10,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2021-12-18 19:40:10,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123578595] [2021-12-18 19:40:10,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:10,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:40:10,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:10,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:40:10,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:40:10,154 INFO L87 Difference]: Start difference. First operand 1472 states and 1643 transitions. Second operand has 31 states, 30 states have (on average 6.866666666666666) internal successors, (206), 31 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) [2021-12-18 19:40:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:10,584 INFO L93 Difference]: Finished difference Result 2187 states and 2423 transitions. [2021-12-18 19:40:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:40:10,584 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 6.866666666666666) internal successors, (206), 31 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) Word has length 94 [2021-12-18 19:40:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:10,588 INFO L225 Difference]: With dead ends: 2187 [2021-12-18 19:40:10,588 INFO L226 Difference]: Without dead ends: 2187 [2021-12-18 19:40:10,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 19:40:10,589 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 526 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:10,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 774 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:40:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-12-18 19:40:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1736. [2021-12-18 19:40:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1734 states have (on average 1.1176470588235294) internal successors, (1938), 1735 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 1938 transitions. [2021-12-18 19:40:10,606 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 1938 transitions. Word has length 94 [2021-12-18 19:40:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:10,607 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 1938 transitions. [2021-12-18 19:40:10,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 6.866666666666666) internal successors, (206), 31 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) [2021-12-18 19:40:10,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 1938 transitions. [2021-12-18 19:40:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 19:40:10,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:10,608 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:10,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-18 19:40:10,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-18 19:40:10,816 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:10,817 INFO L85 PathProgramCache]: Analyzing trace with hash -737545652, now seen corresponding path program 12 times [2021-12-18 19:40:10,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:10,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73697250] [2021-12-18 19:40:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:10,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:11,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:11,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73697250] [2021-12-18 19:40:11,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73697250] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:11,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627925995] [2021-12-18 19:40:11,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:40:11,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:11,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:11,156 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:11,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 19:40:11,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-18 19:40:11,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:11,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-18 19:40:11,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:11,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:11,720 INFO L388 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 [2021-12-18 19:40:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:11,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:11,826 INFO L388 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 13 [2021-12-18 19:40:11,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:40:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:11,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627925995] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:11,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:11,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 43 [2021-12-18 19:40:11,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912612919] [2021-12-18 19:40:11,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:11,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 19:40:11,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 19:40:11,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1676, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:40:11,988 INFO L87 Difference]: Start difference. First operand 1736 states and 1938 transitions. Second operand has 43 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 43 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:13,240 INFO L93 Difference]: Finished difference Result 2714 states and 2979 transitions. [2021-12-18 19:40:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:40:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 43 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 19:40:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:13,244 INFO L225 Difference]: With dead ends: 2714 [2021-12-18 19:40:13,245 INFO L226 Difference]: Without dead ends: 2452 [2021-12-18 19:40:13,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 170 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2021-12-18 19:40:13,245 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 572 mSDsluCounter, 3170 mSDsCounter, 0 mSdLazyCounter, 2676 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 3321 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:13,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 3321 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2676 Invalid, 0 Unknown, 92 Unchecked, 0.8s Time] [2021-12-18 19:40:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-12-18 19:40:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2053. [2021-12-18 19:40:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2051 states have (on average 1.1170160897123353) internal successors, (2291), 2052 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 2291 transitions. [2021-12-18 19:40:13,260 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 2291 transitions. Word has length 96 [2021-12-18 19:40:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:13,260 INFO L470 AbstractCegarLoop]: Abstraction has 2053 states and 2291 transitions. [2021-12-18 19:40:13,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 43 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 2291 transitions. [2021-12-18 19:40:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 19:40:13,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:13,262 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:13,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-18 19:40:13,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:13,469 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash 833771049, now seen corresponding path program 13 times [2021-12-18 19:40:13,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:13,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607555610] [2021-12-18 19:40:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:13,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:13,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:13,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607555610] [2021-12-18 19:40:13,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607555610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:13,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848348265] [2021-12-18 19:40:13,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:40:13,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:13,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:13,789 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:13,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 19:40:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:13,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 19:40:13,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:14,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:14,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:40:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:14,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848348265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:14,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:14,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 47 [2021-12-18 19:40:14,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911498776] [2021-12-18 19:40:14,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:14,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 19:40:14,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:14,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 19:40:14,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 19:40:14,868 INFO L87 Difference]: Start difference. First operand 2053 states and 2291 transitions. Second operand has 48 states, 47 states have (on average 4.425531914893617) internal successors, (208), 48 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) [2021-12-18 19:40:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:15,982 INFO L93 Difference]: Finished difference Result 2697 states and 2961 transitions. [2021-12-18 19:40:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:40:15,982 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.425531914893617) internal successors, (208), 48 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) Word has length 100 [2021-12-18 19:40:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:15,987 INFO L225 Difference]: With dead ends: 2697 [2021-12-18 19:40:15,988 INFO L226 Difference]: Without dead ends: 2697 [2021-12-18 19:40:15,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=815, Invalid=3475, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 19:40:15,988 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 754 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:15,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1623 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:40:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2021-12-18 19:40:16,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2101. [2021-12-18 19:40:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2099 states have (on average 1.1176750833730347) internal successors, (2346), 2100 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 2346 transitions. [2021-12-18 19:40:16,009 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 2346 transitions. Word has length 100 [2021-12-18 19:40:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:16,009 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 2346 transitions. [2021-12-18 19:40:16,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.425531914893617) internal successors, (208), 48 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) [2021-12-18 19:40:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 2346 transitions. [2021-12-18 19:40:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-18 19:40:16,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:16,011 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:16,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:16,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-18 19:40:16,228 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1416936263, now seen corresponding path program 7 times [2021-12-18 19:40:16,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:16,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016914095] [2021-12-18 19:40:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:16,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 29 proven. 215 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:40:16,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:16,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016914095] [2021-12-18 19:40:16,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016914095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:16,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677674452] [2021-12-18 19:40:16,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:40:16,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:16,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:16,492 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:16,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 19:40:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:40:16,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:16,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:17,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:17,901 INFO L388 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 18 treesize of output 18 [2021-12-18 19:40:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 45 proven. 199 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:40:18,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:18,709 INFO L388 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 13 [2021-12-18 19:40:18,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 19:40:18,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:40:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 45 proven. 199 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:40:18,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677674452] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:18,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:18,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 58 [2021-12-18 19:40:18,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406747921] [2021-12-18 19:40:18,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:18,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 19:40:18,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 19:40:18,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=3057, Unknown=0, NotChecked=0, Total=3306 [2021-12-18 19:40:18,783 INFO L87 Difference]: Start difference. First operand 2101 states and 2346 transitions. Second operand has 58 states, 58 states have (on average 4.362068965517241) internal successors, (253), 58 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:23,017 INFO L93 Difference]: Finished difference Result 3203 states and 3541 transitions. [2021-12-18 19:40:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-18 19:40:23,018 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.362068965517241) internal successors, (253), 58 states have internal predecessors, (253), 0 states have call successors, (0), 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 103 [2021-12-18 19:40:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:23,023 INFO L225 Difference]: With dead ends: 3203 [2021-12-18 19:40:23,023 INFO L226 Difference]: Without dead ends: 3142 [2021-12-18 19:40:23,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 197 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=514, Invalid=5966, Unknown=0, NotChecked=0, Total=6480 [2021-12-18 19:40:23,024 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 559 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 2357 SdHoareTripleChecker+Invalid, 2598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 484 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:23,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 2357 Invalid, 2598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2079 Invalid, 0 Unknown, 484 Unchecked, 0.6s Time] [2021-12-18 19:40:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-12-18 19:40:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 2224. [2021-12-18 19:40:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2222 states have (on average 1.1179117911791179) internal successors, (2484), 2223 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 2484 transitions. [2021-12-18 19:40:23,057 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 2484 transitions. Word has length 103 [2021-12-18 19:40:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:23,057 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 2484 transitions. [2021-12-18 19:40:23,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.362068965517241) internal successors, (253), 58 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:23,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 2484 transitions. [2021-12-18 19:40:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-18 19:40:23,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:23,067 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:23,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:23,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-18 19:40:23,287 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1737904387, now seen corresponding path program 14 times [2021-12-18 19:40:23,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:23,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188542320] [2021-12-18 19:40:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:23,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:23,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:23,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188542320] [2021-12-18 19:40:23,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188542320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:23,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338337695] [2021-12-18 19:40:23,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:40:23,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:23,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:23,607 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:23,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 19:40:23,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:40:23,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:23,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-18 19:40:23,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:23,774 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:40:23,775 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:40:24,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:25,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:25,798 INFO L388 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 18 treesize of output 18 [2021-12-18 19:40:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:25,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:26,924 INFO L388 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 13 [2021-12-18 19:40:26,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:40:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 120 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:27,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338337695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:27,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:27,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 79 [2021-12-18 19:40:27,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565494116] [2021-12-18 19:40:27,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:27,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-18 19:40:27,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-18 19:40:27,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=5742, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 19:40:27,933 INFO L87 Difference]: Start difference. First operand 2224 states and 2484 transitions. Second operand has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 79 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:31,195 INFO L93 Difference]: Finished difference Result 2979 states and 3289 transitions. [2021-12-18 19:40:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-18 19:40:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 79 states have internal predecessors, (310), 0 states have call successors, (0), 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 106 [2021-12-18 19:40:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:31,200 INFO L225 Difference]: With dead ends: 2979 [2021-12-18 19:40:31,200 INFO L226 Difference]: Without dead ends: 2912 [2021-12-18 19:40:31,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 182 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2937 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1181, Invalid=13099, Unknown=0, NotChecked=0, Total=14280 [2021-12-18 19:40:31,201 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 1669 mSDsluCounter, 3568 mSDsCounter, 0 mSdLazyCounter, 3994 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 3691 SdHoareTripleChecker+Invalid, 5188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1075 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:31,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 3691 Invalid, 5188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3994 Invalid, 0 Unknown, 1075 Unchecked, 1.3s Time] [2021-12-18 19:40:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2021-12-18 19:40:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2437. [2021-12-18 19:40:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2435 states have (on average 1.1186858316221766) internal successors, (2724), 2436 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 2724 transitions. [2021-12-18 19:40:31,219 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 2724 transitions. Word has length 106 [2021-12-18 19:40:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:31,219 INFO L470 AbstractCegarLoop]: Abstraction has 2437 states and 2724 transitions. [2021-12-18 19:40:31,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 79 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 2724 transitions. [2021-12-18 19:40:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-18 19:40:31,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:31,221 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:31,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:31,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-18 19:40:31,433 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash -209651763, now seen corresponding path program 6 times [2021-12-18 19:40:31,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:31,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024042681] [2021-12-18 19:40:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:31,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:31,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:31,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024042681] [2021-12-18 19:40:31,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024042681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:31,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790052437] [2021-12-18 19:40:31,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:40:31,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:31,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:31,632 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:31,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 19:40:31,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:40:31,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 19:40:31,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:31,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:40:32,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:32,065 INFO L388 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 17 treesize of output 19 [2021-12-18 19:40:32,473 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-18 19:40:32,474 INFO L388 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 23 [2021-12-18 19:40:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 178 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 19:40:32,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:32,837 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1417 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1417) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-18 19:40:32,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:32,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:40:32,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:32,847 INFO L388 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 37 treesize of output 37 [2021-12-18 19:40:32,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:40:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 183 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 19:40:33,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790052437] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:33,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:33,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 43 [2021-12-18 19:40:33,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766143903] [2021-12-18 19:40:33,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:33,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 19:40:33,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 19:40:33,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1593, Unknown=1, NotChecked=80, Total=1806 [2021-12-18 19:40:33,076 INFO L87 Difference]: Start difference. First operand 2437 states and 2724 transitions. Second operand has 43 states, 43 states have (on average 4.488372093023256) internal successors, (193), 43 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) [2021-12-18 19:40:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:33,883 INFO L93 Difference]: Finished difference Result 4169 states and 4629 transitions. [2021-12-18 19:40:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:40:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.488372093023256) internal successors, (193), 43 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) Word has length 107 [2021-12-18 19:40:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:33,887 INFO L225 Difference]: With dead ends: 4169 [2021-12-18 19:40:33,888 INFO L226 Difference]: Without dead ends: 3335 [2021-12-18 19:40:33,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 185 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=272, Invalid=2593, Unknown=1, NotChecked=104, Total=2970 [2021-12-18 19:40:33,888 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 503 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:33,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 2047 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1355 Invalid, 0 Unknown, 311 Unchecked, 0.5s Time] [2021-12-18 19:40:33,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-12-18 19:40:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 2705. [2021-12-18 19:40:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2705 states, 2703 states have (on average 1.1198668146503885) internal successors, (3027), 2704 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 3027 transitions. [2021-12-18 19:40:33,910 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 3027 transitions. Word has length 107 [2021-12-18 19:40:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:33,910 INFO L470 AbstractCegarLoop]: Abstraction has 2705 states and 3027 transitions. [2021-12-18 19:40:33,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.488372093023256) internal successors, (193), 43 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) [2021-12-18 19:40:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 3027 transitions. [2021-12-18 19:40:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-18 19:40:33,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:33,913 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:33,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:34,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:34,130 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:34,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1449397339, now seen corresponding path program 8 times [2021-12-18 19:40:34,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:34,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104720870] [2021-12-18 19:40:34,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:34,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 33 proven. 254 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:40:34,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104720870] [2021-12-18 19:40:34,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104720870] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125747176] [2021-12-18 19:40:34,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:40:34,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:34,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:34,381 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:34,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 19:40:34,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:40:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:34,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 19:40:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:34,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:35,024 INFO L388 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 [2021-12-18 19:40:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 33 proven. 254 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:40:35,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:35,207 INFO L388 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 13 [2021-12-18 19:40:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:40:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 33 proven. 254 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:40:35,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125747176] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:35,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:35,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 40 [2021-12-18 19:40:35,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725698885] [2021-12-18 19:40:35,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:35,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 19:40:35,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 19:40:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:40:35,372 INFO L87 Difference]: Start difference. First operand 2705 states and 3027 transitions. Second operand has 40 states, 40 states have (on average 4.675) internal successors, (187), 40 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:36,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:36,417 INFO L93 Difference]: Finished difference Result 3111 states and 3427 transitions. [2021-12-18 19:40:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:40:36,417 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.675) internal successors, (187), 40 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-18 19:40:36,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:36,420 INFO L225 Difference]: With dead ends: 3111 [2021-12-18 19:40:36,420 INFO L226 Difference]: Without dead ends: 2752 [2021-12-18 19:40:36,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 197 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=3016, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 19:40:36,421 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 683 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:36,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 2084 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1734 Invalid, 0 Unknown, 171 Unchecked, 0.6s Time] [2021-12-18 19:40:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-12-18 19:40:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2315. [2021-12-18 19:40:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2313 states have (on average 1.1137051448335495) internal successors, (2576), 2314 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 2576 transitions. [2021-12-18 19:40:36,438 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 2576 transitions. Word has length 109 [2021-12-18 19:40:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:36,438 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 2576 transitions. [2021-12-18 19:40:36,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.675) internal successors, (187), 40 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 2576 transitions. [2021-12-18 19:40:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-18 19:40:36,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:36,440 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:36,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:36,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-18 19:40:36,657 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:36,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:36,657 INFO L85 PathProgramCache]: Analyzing trace with hash -740047728, now seen corresponding path program 7 times [2021-12-18 19:40:36,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:36,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29920647] [2021-12-18 19:40:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:36,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 15 proven. 189 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:36,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29920647] [2021-12-18 19:40:36,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29920647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159945372] [2021-12-18 19:40:36,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:40:36,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:36,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:36,860 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:36,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 19:40:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:36,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 19:40:36,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:37,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:37,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-12-18 19:40:37,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:40:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 28 proven. 176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:37,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:38,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159945372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:38,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:38,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2021-12-18 19:40:38,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966749308] [2021-12-18 19:40:38,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:38,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 19:40:38,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 19:40:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:40:38,067 INFO L87 Difference]: Start difference. First operand 2315 states and 2576 transitions. Second operand has 40 states, 39 states have (on average 7.358974358974359) internal successors, (287), 40 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:38,791 INFO L93 Difference]: Finished difference Result 3338 states and 3694 transitions. [2021-12-18 19:40:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 19:40:38,791 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 7.358974358974359) internal successors, (287), 40 states have internal predecessors, (287), 0 states have call successors, (0), 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 111 [2021-12-18 19:40:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:38,797 INFO L225 Difference]: With dead ends: 3338 [2021-12-18 19:40:38,797 INFO L226 Difference]: Without dead ends: 3338 [2021-12-18 19:40:38,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=659, Invalid=2881, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 19:40:38,798 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 655 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:38,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 1294 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:40:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-12-18 19:40:38,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2640. [2021-12-18 19:40:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2638 states have (on average 1.1133434420015162) internal successors, (2937), 2639 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 2937 transitions. [2021-12-18 19:40:38,819 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 2937 transitions. Word has length 111 [2021-12-18 19:40:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:38,820 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 2937 transitions. [2021-12-18 19:40:38,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 7.358974358974359) internal successors, (287), 40 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 2937 transitions. [2021-12-18 19:40:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 19:40:38,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:38,822 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:38,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:39,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:39,043 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:39,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash 772743854, now seen corresponding path program 15 times [2021-12-18 19:40:39,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:39,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040935379] [2021-12-18 19:40:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:39,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:39,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:39,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040935379] [2021-12-18 19:40:39,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040935379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:39,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325399488] [2021-12-18 19:40:39,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:40:39,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:39,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:39,368 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:39,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-18 19:40:39,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-18 19:40:39,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 19:40:39,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:39,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:40,174 INFO L388 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 [2021-12-18 19:40:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:40,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:40,371 INFO L388 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 13 [2021-12-18 19:40:40,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:40:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:40,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325399488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:40,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:40,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 49 [2021-12-18 19:40:40,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382383695] [2021-12-18 19:40:40,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:40,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:40:40,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:40:40,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2206, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:40:40,554 INFO L87 Difference]: Start difference. First operand 2640 states and 2937 transitions. Second operand has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:42,371 INFO L93 Difference]: Finished difference Result 5163 states and 5722 transitions. [2021-12-18 19:40:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 19:40:42,374 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 states have internal predecessors, (190), 0 states have call successors, (0), 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 116 [2021-12-18 19:40:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:42,379 INFO L225 Difference]: With dead ends: 5163 [2021-12-18 19:40:42,379 INFO L226 Difference]: Without dead ends: 5077 [2021-12-18 19:40:42,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=423, Invalid=4979, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 19:40:42,380 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 606 mSDsluCounter, 5217 mSDsCounter, 0 mSdLazyCounter, 3872 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 5423 SdHoareTripleChecker+Invalid, 4113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:42,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 5423 Invalid, 4113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3872 Invalid, 0 Unknown, 206 Unchecked, 1.2s Time] [2021-12-18 19:40:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5077 states. [2021-12-18 19:40:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5077 to 3207. [2021-12-18 19:40:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3205 states have (on average 1.1157566302652107) internal successors, (3576), 3206 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 3576 transitions. [2021-12-18 19:40:42,446 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 3576 transitions. Word has length 116 [2021-12-18 19:40:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:42,446 INFO L470 AbstractCegarLoop]: Abstraction has 3207 states and 3576 transitions. [2021-12-18 19:40:42,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 3576 transitions. [2021-12-18 19:40:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 19:40:42,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:42,449 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:42,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:42,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-18 19:40:42,666 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:42,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:42,666 INFO L85 PathProgramCache]: Analyzing trace with hash 783545867, now seen corresponding path program 16 times [2021-12-18 19:40:42,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:42,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860037948] [2021-12-18 19:40:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:42,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:43,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:43,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860037948] [2021-12-18 19:40:43,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860037948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:43,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990745847] [2021-12-18 19:40:43,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:40:43,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:43,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:43,014 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:43,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-18 19:40:43,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:40:43,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 19:40:43,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:43,163 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:40:43,163 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:40:43,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:40:44,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:44,581 INFO L388 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 19 treesize of output 19 [2021-12-18 19:40:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 162 proven. 308 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:44,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:45,876 INFO L388 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 13 [2021-12-18 19:40:45,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:40:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 190 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:47,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990745847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:47,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:47,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30, 30] total 83 [2021-12-18 19:40:47,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767034019] [2021-12-18 19:40:47,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:47,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-18 19:40:47,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:47,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-18 19:40:47,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=6297, Unknown=0, NotChecked=0, Total=6972 [2021-12-18 19:40:47,431 INFO L87 Difference]: Start difference. First operand 3207 states and 3576 transitions. Second operand has 84 states, 83 states have (on average 4.240963855421687) internal successors, (352), 84 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) [2021-12-18 19:40:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:52,592 INFO L93 Difference]: Finished difference Result 6278 states and 6912 transitions. [2021-12-18 19:40:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-18 19:40:52,593 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 4.240963855421687) internal successors, (352), 84 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) Word has length 120 [2021-12-18 19:40:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:52,599 INFO L225 Difference]: With dead ends: 6278 [2021-12-18 19:40:52,599 INFO L226 Difference]: Without dead ends: 6216 [2021-12-18 19:40:52,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3235 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4086, Invalid=16794, Unknown=0, NotChecked=0, Total=20880 [2021-12-18 19:40:52,601 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 2539 mSDsluCounter, 3560 mSDsCounter, 0 mSdLazyCounter, 5473 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2539 SdHoareTripleChecker+Valid, 3708 SdHoareTripleChecker+Invalid, 6068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 5473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:52,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2539 Valid, 3708 Invalid, 6068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 5473 Invalid, 0 Unknown, 157 Unchecked, 2.1s Time] [2021-12-18 19:40:52,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6216 states. [2021-12-18 19:40:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6216 to 3863. [2021-12-18 19:40:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3861 states have (on average 1.1225071225071226) internal successors, (4334), 3862 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 4334 transitions. [2021-12-18 19:40:52,634 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 4334 transitions. Word has length 120 [2021-12-18 19:40:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:52,634 INFO L470 AbstractCegarLoop]: Abstraction has 3863 states and 4334 transitions. [2021-12-18 19:40:52,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 4.240963855421687) internal successors, (352), 84 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) [2021-12-18 19:40:52,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 4334 transitions. [2021-12-18 19:40:52,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-18 19:40:52,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:52,637 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:52,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:52,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:52,854 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:52,854 INFO L85 PathProgramCache]: Analyzing trace with hash 185356263, now seen corresponding path program 9 times [2021-12-18 19:40:52,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:52,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312407048] [2021-12-18 19:40:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:52,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 37 proven. 365 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:40:53,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:53,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312407048] [2021-12-18 19:40:53,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312407048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:53,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311193469] [2021-12-18 19:40:53,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:40:53,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:53,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:53,148 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:53,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 19:40:53,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-18 19:40:53,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 19:40:53,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:53,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:53,988 INFO L388 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 [2021-12-18 19:40:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 37 proven. 365 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:40:53,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:54,134 INFO L388 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 13 [2021-12-18 19:40:54,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:40:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 37 proven. 365 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:40:54,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311193469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:54,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:54,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 46 [2021-12-18 19:40:54,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290076387] [2021-12-18 19:40:54,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:54,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 19:40:54,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 19:40:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:40:54,318 INFO L87 Difference]: Start difference. First operand 3863 states and 4334 transitions. Second operand has 46 states, 46 states have (on average 4.608695652173913) internal successors, (212), 46 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:56,042 INFO L93 Difference]: Finished difference Result 4439 states and 4903 transitions. [2021-12-18 19:40:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:40:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.608695652173913) internal successors, (212), 46 states have internal predecessors, (212), 0 states have call successors, (0), 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 123 [2021-12-18 19:40:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:56,050 INFO L225 Difference]: With dead ends: 4439 [2021-12-18 19:40:56,050 INFO L226 Difference]: Without dead ends: 3980 [2021-12-18 19:40:56,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 223 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=476, Invalid=4216, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 19:40:56,051 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 748 mSDsluCounter, 3850 mSDsCounter, 0 mSdLazyCounter, 3323 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 4024 SdHoareTripleChecker+Invalid, 3391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:56,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 4024 Invalid, 3391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3323 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 19:40:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3980 states. [2021-12-18 19:40:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3980 to 3532. [2021-12-18 19:40:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3532 states, 3530 states have (on average 1.1172804532577905) internal successors, (3944), 3531 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3532 states to 3532 states and 3944 transitions. [2021-12-18 19:40:56,078 INFO L78 Accepts]: Start accepts. Automaton has 3532 states and 3944 transitions. Word has length 123 [2021-12-18 19:40:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:56,078 INFO L470 AbstractCegarLoop]: Abstraction has 3532 states and 3944 transitions. [2021-12-18 19:40:56,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.608695652173913) internal successors, (212), 46 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3532 states and 3944 transitions. [2021-12-18 19:40:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 19:40:56,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:56,081 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:56,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:56,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-18 19:40:56,295 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash -772988267, now seen corresponding path program 8 times [2021-12-18 19:40:56,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:56,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354669282] [2021-12-18 19:40:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:56,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:56,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:56,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354669282] [2021-12-18 19:40:56,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354669282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:56,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113325079] [2021-12-18 19:40:56,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:40:56,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:56,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:56,560 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:56,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-18 19:40:56,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:40:56,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:56,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 19:40:56,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:56,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:40:56,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:56,961 INFO L388 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 17 treesize of output 19 [2021-12-18 19:40:57,135 INFO L388 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 [2021-12-18 19:40:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:57,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:57,264 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1756 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1756) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) is different from false [2021-12-18 19:40:57,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:57,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:40:57,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:57,272 INFO L388 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 37 treesize of output 37 [2021-12-18 19:40:57,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:40:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:57,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113325079] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:57,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:57,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 34 [2021-12-18 19:40:57,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621951682] [2021-12-18 19:40:57,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:57,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:40:57,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:57,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:40:57,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=961, Unknown=1, NotChecked=62, Total=1122 [2021-12-18 19:40:57,455 INFO L87 Difference]: Start difference. First operand 3532 states and 3944 transitions. Second operand has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 34 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) [2021-12-18 19:40:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:58,044 INFO L93 Difference]: Finished difference Result 5937 states and 6607 transitions. [2021-12-18 19:40:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:40:58,045 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 34 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) Word has length 124 [2021-12-18 19:40:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:58,056 INFO L225 Difference]: With dead ends: 5937 [2021-12-18 19:40:58,056 INFO L226 Difference]: Without dead ends: 4282 [2021-12-18 19:40:58,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 229 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=1975, Unknown=1, NotChecked=90, Total=2256 [2021-12-18 19:40:58,057 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 189 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:58,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1687 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1266 Invalid, 0 Unknown, 233 Unchecked, 0.3s Time] [2021-12-18 19:40:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-12-18 19:40:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3725. [2021-12-18 19:40:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3723 states have (on average 1.1176470588235294) internal successors, (4161), 3724 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 4161 transitions. [2021-12-18 19:40:58,084 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 4161 transitions. Word has length 124 [2021-12-18 19:40:58,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:58,084 INFO L470 AbstractCegarLoop]: Abstraction has 3725 states and 4161 transitions. [2021-12-18 19:40:58,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 34 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) [2021-12-18 19:40:58,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 4161 transitions. [2021-12-18 19:40:58,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-18 19:40:58,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:58,087 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:58,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:58,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-18 19:40:58,304 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:40:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:58,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2098926642, now seen corresponding path program 9 times [2021-12-18 19:40:58,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:58,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720475246] [2021-12-18 19:40:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:58,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 28 proven. 269 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:58,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:58,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720475246] [2021-12-18 19:40:58,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720475246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:58,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393110023] [2021-12-18 19:40:58,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:40:58,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:58,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:58,513 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:58,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-18 19:40:58,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-18 19:40:58,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:58,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 19:40:58,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 45 proven. 252 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:59,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:59,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 19:41:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 66 proven. 231 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:41:00,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393110023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:00,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:00,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 41 [2021-12-18 19:41:00,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336864635] [2021-12-18 19:41:00,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:00,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-18 19:41:00,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-18 19:41:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 19:41:00,117 INFO L87 Difference]: Start difference. First operand 3725 states and 4161 transitions. Second operand has 42 states, 41 states have (on average 7.804878048780488) internal successors, (320), 42 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:01,042 INFO L93 Difference]: Finished difference Result 5843 states and 6504 transitions. [2021-12-18 19:41:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:41:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 7.804878048780488) internal successors, (320), 42 states have internal predecessors, (320), 0 states have call successors, (0), 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 128 [2021-12-18 19:41:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:01,046 INFO L225 Difference]: With dead ends: 5843 [2021-12-18 19:41:01,046 INFO L226 Difference]: Without dead ends: 5843 [2021-12-18 19:41:01,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=748, Invalid=2912, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:41:01,052 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 925 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:01,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 1283 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:41:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5843 states. [2021-12-18 19:41:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5843 to 4197. [2021-12-18 19:41:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4197 states, 4195 states have (on average 1.1175208581644815) internal successors, (4688), 4196 states have internal predecessors, (4688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4197 states to 4197 states and 4688 transitions. [2021-12-18 19:41:01,111 INFO L78 Accepts]: Start accepts. Automaton has 4197 states and 4688 transitions. Word has length 128 [2021-12-18 19:41:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:01,112 INFO L470 AbstractCegarLoop]: Abstraction has 4197 states and 4688 transitions. [2021-12-18 19:41:01,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 7.804878048780488) internal successors, (320), 42 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 4197 states and 4688 transitions. [2021-12-18 19:41:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-18 19:41:01,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:01,116 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:01,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-18 19:41:01,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-18 19:41:01,330 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:41:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1092548019, now seen corresponding path program 17 times [2021-12-18 19:41:01,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:01,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179588961] [2021-12-18 19:41:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:01,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 347 proven. 251 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:01,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:01,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179588961] [2021-12-18 19:41:01,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179588961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:01,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971618480] [2021-12-18 19:41:01,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:41:01,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:01,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:01,676 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:01,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-18 19:41:01,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-18 19:41:01,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:01,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 19:41:01,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:01,890 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:41:01,890 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:41:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 408 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:02,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 408 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:03,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971618480] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:03,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:03,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 69 [2021-12-18 19:41:03,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835731518] [2021-12-18 19:41:03,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:03,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 19:41:03,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:03,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 19:41:03,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=3967, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 19:41:03,660 INFO L87 Difference]: Start difference. First operand 4197 states and 4688 transitions. Second operand has 69 states, 69 states have (on average 4.565217391304348) internal successors, (315), 69 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:07,520 INFO L93 Difference]: Finished difference Result 8374 states and 9094 transitions. [2021-12-18 19:41:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-18 19:41:07,520 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 4.565217391304348) internal successors, (315), 69 states have internal predecessors, (315), 0 states have call successors, (0), 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 132 [2021-12-18 19:41:07,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:07,539 INFO L225 Difference]: With dead ends: 8374 [2021-12-18 19:41:07,554 INFO L226 Difference]: Without dead ends: 7031 [2021-12-18 19:41:07,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6770 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5539, Invalid=19583, Unknown=0, NotChecked=0, Total=25122 [2021-12-18 19:41:07,555 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 1881 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 2683 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1881 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:07,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1881 Valid, 2251 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2683 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 19:41:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7031 states. [2021-12-18 19:41:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7031 to 4225. [2021-12-18 19:41:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 4223 states have (on average 1.1153208619464836) internal successors, (4710), 4224 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 4710 transitions. [2021-12-18 19:41:07,600 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 4710 transitions. Word has length 132 [2021-12-18 19:41:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:07,601 INFO L470 AbstractCegarLoop]: Abstraction has 4225 states and 4710 transitions. [2021-12-18 19:41:07,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 4.565217391304348) internal successors, (315), 69 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 4710 transitions. [2021-12-18 19:41:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-18 19:41:07,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:07,604 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:07,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-18 19:41:07,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-18 19:41:07,820 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:41:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash -915181808, now seen corresponding path program 18 times [2021-12-18 19:41:07,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:07,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427093313] [2021-12-18 19:41:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:07,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:08,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427093313] [2021-12-18 19:41:08,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427093313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416910909] [2021-12-18 19:41:08,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:41:08,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:08,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:08,300 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:08,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-18 19:41:08,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-18 19:41:08,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-18 19:41:08,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:08,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:41:09,270 INFO L388 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 [2021-12-18 19:41:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:09,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:09,461 INFO L388 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 13 [2021-12-18 19:41:09,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:41:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:09,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416910909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:09,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:09,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 55 [2021-12-18 19:41:09,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190753181] [2021-12-18 19:41:09,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:09,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-18 19:41:09,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-18 19:41:09,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2808, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 19:41:09,637 INFO L87 Difference]: Start difference. First operand 4225 states and 4710 transitions. Second operand has 55 states, 55 states have (on average 3.963636363636364) internal successors, (218), 55 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:12,355 INFO L93 Difference]: Finished difference Result 6606 states and 7297 transitions. [2021-12-18 19:41:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 19:41:12,356 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.963636363636364) internal successors, (218), 55 states have internal predecessors, (218), 0 states have call successors, (0), 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 136 [2021-12-18 19:41:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:12,359 INFO L225 Difference]: With dead ends: 6606 [2021-12-18 19:41:12,359 INFO L226 Difference]: Without dead ends: 5985 [2021-12-18 19:41:12,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 246 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=581, Invalid=6391, Unknown=0, NotChecked=0, Total=6972 [2021-12-18 19:41:12,375 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 1011 mSDsluCounter, 7147 mSDsCounter, 0 mSdLazyCounter, 5945 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 7393 SdHoareTripleChecker+Invalid, 6026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 5945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:12,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 7393 Invalid, 6026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 5945 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-18 19:41:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5985 states. [2021-12-18 19:41:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5985 to 4249. [2021-12-18 19:41:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 4247 states have (on average 1.1149046385684012) internal successors, (4735), 4248 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 4735 transitions. [2021-12-18 19:41:12,437 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 4735 transitions. Word has length 136 [2021-12-18 19:41:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:12,438 INFO L470 AbstractCegarLoop]: Abstraction has 4249 states and 4735 transitions. [2021-12-18 19:41:12,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.963636363636364) internal successors, (218), 55 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 4735 transitions. [2021-12-18 19:41:12,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-18 19:41:12,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:12,448 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:12,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-18 19:41:12,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-18 19:41:12,648 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:41:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1241386515, now seen corresponding path program 19 times [2021-12-18 19:41:12,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:12,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917263571] [2021-12-18 19:41:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:12,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:13,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917263571] [2021-12-18 19:41:13,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917263571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737094691] [2021-12-18 19:41:13,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:41:13,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:13,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:13,090 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:13,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-18 19:41:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-18 19:41:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:13,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:14,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:41:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:14,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737094691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:14,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:14,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 63 [2021-12-18 19:41:14,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437561654] [2021-12-18 19:41:14,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:14,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 19:41:14,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:14,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 19:41:14,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=3573, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 19:41:14,657 INFO L87 Difference]: Start difference. First operand 4249 states and 4735 transitions. Second operand has 64 states, 63 states have (on average 4.571428571428571) internal successors, (288), 64 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:17,479 INFO L93 Difference]: Finished difference Result 6472 states and 7141 transitions. [2021-12-18 19:41:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 19:41:17,479 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.571428571428571) internal successors, (288), 64 states have internal predecessors, (288), 0 states have call successors, (0), 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 140 [2021-12-18 19:41:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:17,483 INFO L225 Difference]: With dead ends: 6472 [2021-12-18 19:41:17,483 INFO L226 Difference]: Without dead ends: 6472 [2021-12-18 19:41:17,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1515, Invalid=6495, Unknown=0, NotChecked=0, Total=8010 [2021-12-18 19:41:17,483 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 1117 mSDsluCounter, 3896 mSDsCounter, 0 mSdLazyCounter, 6096 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 4046 SdHoareTripleChecker+Invalid, 6171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 6096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:17,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1117 Valid, 4046 Invalid, 6171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 6096 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-18 19:41:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6472 states. [2021-12-18 19:41:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6472 to 4321. [2021-12-18 19:41:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4321 states, 4319 states have (on average 1.1155360037045612) internal successors, (4818), 4320 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4321 states to 4321 states and 4818 transitions. [2021-12-18 19:41:17,540 INFO L78 Accepts]: Start accepts. Automaton has 4321 states and 4818 transitions. Word has length 140 [2021-12-18 19:41:17,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:17,540 INFO L470 AbstractCegarLoop]: Abstraction has 4321 states and 4818 transitions. [2021-12-18 19:41:17,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.571428571428571) internal successors, (288), 64 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4321 states and 4818 transitions. [2021-12-18 19:41:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-18 19:41:17,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:17,544 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:17,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-18 19:41:17,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:17,750 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:41:17,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2041039411, now seen corresponding path program 10 times [2021-12-18 19:41:17,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:17,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394035566] [2021-12-18 19:41:17,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:17,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:41:18,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:18,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394035566] [2021-12-18 19:41:18,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394035566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:18,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977283395] [2021-12-18 19:41:18,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:41:18,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:18,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:18,026 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:18,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-18 19:41:18,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:41:18,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-18 19:41:18,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:18,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:41:18,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-12-18 19:41:18,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:41:18,575 INFO L388 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 16 treesize of output 18 [2021-12-18 19:41:19,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:19,270 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 19:41:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 310 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:41:19,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:20,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:41:20,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-18 19:41:20,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:41:20,063 INFO L388 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 33 treesize of output 33 [2021-12-18 19:41:20,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-18 19:41:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 299 proven. 83 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:41:20,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977283395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:20,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:20,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 56 [2021-12-18 19:41:20,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253271250] [2021-12-18 19:41:20,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:20,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 19:41:20,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:20,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 19:41:20,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2797, Unknown=3, NotChecked=0, Total=3080 [2021-12-18 19:41:20,929 INFO L87 Difference]: Start difference. First operand 4321 states and 4818 transitions. Second operand has 56 states, 56 states have (on average 6.428571428571429) internal successors, (360), 56 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:22,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:22,070 INFO L93 Difference]: Finished difference Result 8310 states and 9242 transitions. [2021-12-18 19:41:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 19:41:22,070 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 6.428571428571429) internal successors, (360), 56 states have internal predecessors, (360), 0 states have call successors, (0), 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 141 [2021-12-18 19:41:22,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:22,074 INFO L225 Difference]: With dead ends: 8310 [2021-12-18 19:41:22,074 INFO L226 Difference]: Without dead ends: 5807 [2021-12-18 19:41:22,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 256 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=715, Invalid=6422, Unknown=3, NotChecked=0, Total=7140 [2021-12-18 19:41:22,075 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 376 mSDsluCounter, 2231 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:22,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 2321 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 708 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2021-12-18 19:41:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5807 states. [2021-12-18 19:41:22,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5807 to 4464. [2021-12-18 19:41:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4464 states, 4462 states have (on average 1.115419094576423) internal successors, (4977), 4463 states have internal predecessors, (4977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 4977 transitions. [2021-12-18 19:41:22,136 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 4977 transitions. Word has length 141 [2021-12-18 19:41:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:22,136 INFO L470 AbstractCegarLoop]: Abstraction has 4464 states and 4977 transitions. [2021-12-18 19:41:22,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 6.428571428571429) internal successors, (360), 56 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 4977 transitions. [2021-12-18 19:41:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-18 19:41:22,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:22,141 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:22,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-18 19:41:22,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-12-18 19:41:22,359 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:41:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash -781081034, now seen corresponding path program 11 times [2021-12-18 19:41:22,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:22,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892611709] [2021-12-18 19:41:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:22,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 45 proven. 362 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:41:22,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:22,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892611709] [2021-12-18 19:41:22,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892611709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:22,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644772348] [2021-12-18 19:41:22,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:41:22,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:22,605 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:22,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-18 19:41:22,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-18 19:41:22,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:22,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 19:41:22,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:22,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:22,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-12-18 19:41:22,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:41:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 66 proven. 341 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:41:23,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 91 proven. 316 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:41:24,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644772348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:24,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:24,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 48 [2021-12-18 19:41:24,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850021350] [2021-12-18 19:41:24,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:24,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:41:24,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:24,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:41:24,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2065, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:41:24,532 INFO L87 Difference]: Start difference. First operand 4464 states and 4977 transitions. Second operand has 49 states, 48 states have (on average 8.041666666666666) internal successors, (386), 49 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:25,830 INFO L93 Difference]: Finished difference Result 6804 states and 7568 transitions. [2021-12-18 19:41:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 19:41:25,830 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 8.041666666666666) internal successors, (386), 49 states have internal predecessors, (386), 0 states have call successors, (0), 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 145 [2021-12-18 19:41:25,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:25,836 INFO L225 Difference]: With dead ends: 6804 [2021-12-18 19:41:25,836 INFO L226 Difference]: Without dead ends: 6804 [2021-12-18 19:41:25,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=953, Invalid=4017, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 19:41:25,837 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 719 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:25,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 1966 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:41:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6804 states. [2021-12-18 19:41:25,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6804 to 4980. [2021-12-18 19:41:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4978 states have (on average 1.1155082362394535) internal successors, (5553), 4979 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 5553 transitions. [2021-12-18 19:41:25,925 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 5553 transitions. Word has length 145 [2021-12-18 19:41:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:25,926 INFO L470 AbstractCegarLoop]: Abstraction has 4980 states and 5553 transitions. [2021-12-18 19:41:25,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 8.041666666666666) internal successors, (386), 49 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 5553 transitions. [2021-12-18 19:41:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-18 19:41:25,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:25,930 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:25,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-18 19:41:26,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:26,151 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:41:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1268672449, now seen corresponding path program 20 times [2021-12-18 19:41:26,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:26,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562273854] [2021-12-18 19:41:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:26,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:26,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:26,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562273854] [2021-12-18 19:41:26,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562273854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:26,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864797241] [2021-12-18 19:41:26,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:41:26,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:26,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:26,714 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:26,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-18 19:41:26,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:41:26,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:26,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-18 19:41:26,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:27,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:41:29,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:41:29,617 INFO L388 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 18 treesize of output 18 [2021-12-18 19:41:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:29,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:31,236 INFO L388 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 13 [2021-12-18 19:41:31,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 19:41:31,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:41:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:31,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864797241] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:31,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:31,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 88 [2021-12-18 19:41:31,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016132275] [2021-12-18 19:41:31,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:31,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-18 19:41:31,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-18 19:41:31,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=7140, Unknown=0, NotChecked=0, Total=7656 [2021-12-18 19:41:31,313 INFO L87 Difference]: Start difference. First operand 4980 states and 5553 transitions. Second operand has 88 states, 88 states have (on average 4.238636363636363) internal successors, (373), 88 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:35,457 INFO L93 Difference]: Finished difference Result 8012 states and 8903 transitions. [2021-12-18 19:41:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-18 19:41:35,457 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 4.238636363636363) internal successors, (373), 88 states have internal predecessors, (373), 0 states have call successors, (0), 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 146 [2021-12-18 19:41:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:35,465 INFO L225 Difference]: With dead ends: 8012 [2021-12-18 19:41:35,465 INFO L226 Difference]: Without dead ends: 7912 [2021-12-18 19:41:35,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3864 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1016, Invalid=13990, Unknown=0, NotChecked=0, Total=15006 [2021-12-18 19:41:35,467 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 1338 mSDsluCounter, 7540 mSDsCounter, 0 mSdLazyCounter, 6568 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 7768 SdHoareTripleChecker+Invalid, 9530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 6568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2899 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:35,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1338 Valid, 7768 Invalid, 9530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 6568 Invalid, 0 Unknown, 2899 Unchecked, 2.0s Time] [2021-12-18 19:41:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7912 states. [2021-12-18 19:41:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7912 to 5544. [2021-12-18 19:41:35,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5544 states, 5542 states have (on average 1.1178274990977985) internal successors, (6195), 5543 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5544 states to 5544 states and 6195 transitions. [2021-12-18 19:41:35,534 INFO L78 Accepts]: Start accepts. Automaton has 5544 states and 6195 transitions. Word has length 146 [2021-12-18 19:41:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:35,534 INFO L470 AbstractCegarLoop]: Abstraction has 5544 states and 6195 transitions. [2021-12-18 19:41:35,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 4.238636363636363) internal successors, (373), 88 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5544 states and 6195 transitions. [2021-12-18 19:41:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-18 19:41:35,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:35,539 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:35,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-18 19:41:35,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-18 19:41:35,753 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:41:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:35,754 INFO L85 PathProgramCache]: Analyzing trace with hash 971462514, now seen corresponding path program 21 times [2021-12-18 19:41:35,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:35,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194422639] [2021-12-18 19:41:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:35,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:36,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194422639] [2021-12-18 19:41:36,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194422639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002712684] [2021-12-18 19:41:36,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:41:36,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:36,349 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:36,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-18 19:41:36,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-18 19:41:36,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:36,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-18 19:41:36,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:37,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:41:37,437 INFO L388 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 [2021-12-18 19:41:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:37,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:37,600 INFO L388 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 13 [2021-12-18 19:41:37,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:41:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:37,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002712684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:37,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:37,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 61 [2021-12-18 19:41:37,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094321357] [2021-12-18 19:41:37,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:37,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-18 19:41:37,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-18 19:41:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3482, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:41:37,778 INFO L87 Difference]: Start difference. First operand 5544 states and 6195 transitions. Second operand has 61 states, 61 states have (on average 4.032786885245901) internal successors, (246), 61 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:41,039 INFO L93 Difference]: Finished difference Result 10832 states and 12062 transitions. [2021-12-18 19:41:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 19:41:41,039 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.032786885245901) internal successors, (246), 61 states have internal predecessors, (246), 0 states have call successors, (0), 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 156 [2021-12-18 19:41:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:41,046 INFO L225 Difference]: With dead ends: 10832 [2021-12-18 19:41:41,046 INFO L226 Difference]: Without dead ends: 10712 [2021-12-18 19:41:41,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 284 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=651, Invalid=8091, Unknown=0, NotChecked=0, Total=8742 [2021-12-18 19:41:41,048 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 1567 mSDsluCounter, 9119 mSDsCounter, 0 mSdLazyCounter, 7545 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 9414 SdHoareTripleChecker+Invalid, 7825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 7545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:41,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 9414 Invalid, 7825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 7545 Invalid, 0 Unknown, 157 Unchecked, 2.2s Time] [2021-12-18 19:41:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10712 states. [2021-12-18 19:41:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10712 to 7198. [2021-12-18 19:41:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7198 states, 7196 states have (on average 1.122568093385214) internal successors, (8078), 7197 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:41,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7198 states to 7198 states and 8078 transitions. [2021-12-18 19:41:41,125 INFO L78 Accepts]: Start accepts. Automaton has 7198 states and 8078 transitions. Word has length 156 [2021-12-18 19:41:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:41,125 INFO L470 AbstractCegarLoop]: Abstraction has 7198 states and 8078 transitions. [2021-12-18 19:41:41,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.032786885245901) internal successors, (246), 61 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 7198 states and 8078 transitions. [2021-12-18 19:41:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-18 19:41:41,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:41,131 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:41,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-18 19:41:41,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:41,348 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:41:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:41,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1703255727, now seen corresponding path program 12 times [2021-12-18 19:41:41,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:41,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261162181] [2021-12-18 19:41:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:41,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 127 proven. 378 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:41:41,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:41,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261162181] [2021-12-18 19:41:41,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261162181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:41,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241698729] [2021-12-18 19:41:41,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:41:41,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:41,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:41,728 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:41,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-18 19:41:42,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-18 19:41:42,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:42,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-18 19:41:42,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:42,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:41:42,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:41:42,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:41:42,699 INFO L388 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 5 treesize of output 3 [2021-12-18 19:41:42,763 INFO L388 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 25 treesize of output 24 [2021-12-18 19:41:45,101 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 19:41:45,102 INFO L388 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 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-18 19:41:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:45,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:46,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 19:42:49,983 INFO L354 Elim1Store]: treesize reduction 76, result has 46.1 percent of original size [2021-12-18 19:42:49,984 INFO L388 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 3 case distinctions, treesize of input 4611 treesize of output 2612 [2021-12-18 19:42:50,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:42:50,001 INFO L388 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 2612 treesize of output 2484 [2021-12-18 19:42:50,526 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-12-18 19:42:50,526 INFO L388 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 28 treesize of output 22 [2021-12-18 19:42:50,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:42:50,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 193 [2021-12-18 19:42:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 496 refuted. 4 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:42:53,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241698729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:53,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:53,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 34, 31] total 83 [2021-12-18 19:42:53,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344431868] [2021-12-18 19:42:53,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:53,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-18 19:42:53,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:53,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-18 19:42:53,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=6483, Unknown=41, NotChecked=0, Total=6806 [2021-12-18 19:42:53,788 INFO L87 Difference]: Start difference. First operand 7198 states and 8078 transitions. Second operand has 83 states, 83 states have (on average 5.445783132530121) internal successors, (452), 83 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:58,376 INFO L93 Difference]: Finished difference Result 11644 states and 13032 transitions. [2021-12-18 19:42:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 19:42:58,377 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 5.445783132530121) internal successors, (452), 83 states have internal predecessors, (452), 0 states have call successors, (0), 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 158 [2021-12-18 19:42:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:58,385 INFO L225 Difference]: With dead ends: 11644 [2021-12-18 19:42:58,385 INFO L226 Difference]: Without dead ends: 8714 [2021-12-18 19:42:58,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=482, Invalid=10817, Unknown=43, NotChecked=0, Total=11342 [2021-12-18 19:42:58,386 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 225 mSDsluCounter, 3594 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 3697 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:58,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 3697 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1323 Invalid, 0 Unknown, 393 Unchecked, 0.5s Time] [2021-12-18 19:42:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8714 states. [2021-12-18 19:42:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8714 to 7608. [2021-12-18 19:42:58,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7608 states, 7606 states have (on average 1.123192216671049) internal successors, (8543), 7607 states have internal predecessors, (8543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 8543 transitions. [2021-12-18 19:42:58,462 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 8543 transitions. Word has length 158 [2021-12-18 19:42:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:58,463 INFO L470 AbstractCegarLoop]: Abstraction has 7608 states and 8543 transitions. [2021-12-18 19:42:58,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 5.445783132530121) internal successors, (452), 83 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 8543 transitions. [2021-12-18 19:42:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-18 19:42:58,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:58,468 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:58,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:58,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:58,693 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:42:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:58,694 INFO L85 PathProgramCache]: Analyzing trace with hash -533935665, now seen corresponding path program 22 times [2021-12-18 19:42:58,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:58,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036920052] [2021-12-18 19:42:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:58,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:42:59,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036920052] [2021-12-18 19:42:59,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036920052] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997774704] [2021-12-18 19:42:59,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:42:59,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:59,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:59,354 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:59,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-18 19:42:59,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:42:59,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:59,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-18 19:42:59,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:59,560 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:42:59,561 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:43:00,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:43:01,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:43:01,137 INFO L388 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 19 treesize of output 19 [2021-12-18 19:43:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 338 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:43:01,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:02,692 INFO L388 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 13 [2021-12-18 19:43:02,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:43:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 378 proven. 560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:43:05,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997774704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:05,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:05,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 38, 38] total 107 [2021-12-18 19:43:05,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674979139] [2021-12-18 19:43:05,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:05,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-18 19:43:05,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-18 19:43:05,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=10447, Unknown=0, NotChecked=0, Total=11556 [2021-12-18 19:43:05,243 INFO L87 Difference]: Start difference. First operand 7608 states and 8543 transitions. Second operand has 108 states, 107 states have (on average 4.411214953271028) internal successors, (472), 108 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:16,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:16,351 INFO L93 Difference]: Finished difference Result 14980 states and 16544 transitions. [2021-12-18 19:43:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-18 19:43:16,352 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 4.411214953271028) internal successors, (472), 108 states have internal predecessors, (472), 0 states have call successors, (0), 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 160 [2021-12-18 19:43:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:16,362 INFO L225 Difference]: With dead ends: 14980 [2021-12-18 19:43:16,362 INFO L226 Difference]: Without dead ends: 13599 [2021-12-18 19:43:16,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5999 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=8169, Invalid=30837, Unknown=0, NotChecked=0, Total=39006 [2021-12-18 19:43:16,365 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 3691 mSDsluCounter, 6097 mSDsCounter, 0 mSdLazyCounter, 9503 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3691 SdHoareTripleChecker+Valid, 6294 SdHoareTripleChecker+Invalid, 10182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 9503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:16,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3691 Valid, 6294 Invalid, 10182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 9503 Invalid, 0 Unknown, 309 Unchecked, 4.2s Time] [2021-12-18 19:43:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-12-18 19:43:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 7919. [2021-12-18 19:43:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7919 states, 7917 states have (on average 1.1260578501957812) internal successors, (8915), 7918 states have internal predecessors, (8915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7919 states to 7919 states and 8915 transitions. [2021-12-18 19:43:16,495 INFO L78 Accepts]: Start accepts. Automaton has 7919 states and 8915 transitions. Word has length 160 [2021-12-18 19:43:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:16,496 INFO L470 AbstractCegarLoop]: Abstraction has 7919 states and 8915 transitions. [2021-12-18 19:43:16,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 4.411214953271028) internal successors, (472), 108 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 7919 states and 8915 transitions. [2021-12-18 19:43:16,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-18 19:43:16,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:16,500 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:16,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-18 19:43:16,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-18 19:43:16,718 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:43:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash 618981644, now seen corresponding path program 13 times [2021-12-18 19:43:16,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:16,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145554861] [2021-12-18 19:43:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:16,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 66 proven. 468 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:43:17,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:17,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145554861] [2021-12-18 19:43:17,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145554861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:17,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268248561] [2021-12-18 19:43:17,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:43:17,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:17,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:17,012 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:17,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-18 19:43:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:17,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 19:43:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:17,316 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:43:17,316 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:43:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 91 proven. 449 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:43:20,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 120 proven. 420 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:43:21,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268248561] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:21,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:21,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 25] total 68 [2021-12-18 19:43:21,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645992613] [2021-12-18 19:43:21,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:21,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 19:43:21,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:21,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 19:43:21,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=4258, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 19:43:21,756 INFO L87 Difference]: Start difference. First operand 7919 states and 8915 transitions. Second operand has 69 states, 68 states have (on average 6.75) internal successors, (459), 69 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:22,514 INFO L93 Difference]: Finished difference Result 8702 states and 9781 transitions. [2021-12-18 19:43:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-18 19:43:22,514 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 6.75) internal successors, (459), 69 states have internal predecessors, (459), 0 states have call successors, (0), 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 162 [2021-12-18 19:43:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:22,520 INFO L225 Difference]: With dead ends: 8702 [2021-12-18 19:43:22,521 INFO L226 Difference]: Without dead ends: 8702 [2021-12-18 19:43:22,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 282 SyntacticMatches, 14 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=837, Invalid=7535, Unknown=0, NotChecked=0, Total=8372 [2021-12-18 19:43:22,521 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 320 mSDsluCounter, 1999 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 2085 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:22,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 2085 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2021-12-18 19:43:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8702 states. [2021-12-18 19:43:22,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8702 to 8650. [2021-12-18 19:43:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8650 states, 8648 states have (on average 1.1259250693802034) internal successors, (9737), 8649 states have internal predecessors, (9737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8650 states to 8650 states and 9737 transitions. [2021-12-18 19:43:22,588 INFO L78 Accepts]: Start accepts. Automaton has 8650 states and 9737 transitions. Word has length 162 [2021-12-18 19:43:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:22,589 INFO L470 AbstractCegarLoop]: Abstraction has 8650 states and 9737 transitions. [2021-12-18 19:43:22,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 6.75) internal successors, (459), 69 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 8650 states and 9737 transitions. [2021-12-18 19:43:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-18 19:43:22,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:22,594 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:22,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-18 19:43:22,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-18 19:43:22,807 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:43:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash 584804931, now seen corresponding path program 10 times [2021-12-18 19:43:22,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:22,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121531392] [2021-12-18 19:43:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:22,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 53 proven. 785 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:43:23,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:23,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121531392] [2021-12-18 19:43:23,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121531392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:23,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267890174] [2021-12-18 19:43:23,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:43:23,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:23,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:23,380 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:23,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-18 19:43:23,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:43:23,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:43:23,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-18 19:43:23,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:23,581 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:43:23,581 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:43:24,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:43:25,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:25,574 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 19:43:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 461 proven. 377 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:43:25,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:26,981 INFO L388 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 13 treesize of output 11 [2021-12-18 19:43:26,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:43:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 438 proven. 400 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:43:28,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267890174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:28,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:28,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 97 [2021-12-18 19:43:28,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445688142] [2021-12-18 19:43:28,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:28,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-18 19:43:28,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-18 19:43:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=8519, Unknown=0, NotChecked=0, Total=9312 [2021-12-18 19:43:28,226 INFO L87 Difference]: Start difference. First operand 8650 states and 9737 transitions. Second operand has 97 states, 97 states have (on average 4.680412371134021) internal successors, (454), 97 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:30,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:30,947 INFO L93 Difference]: Finished difference Result 12349 states and 13866 transitions. [2021-12-18 19:43:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-18 19:43:30,947 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.680412371134021) internal successors, (454), 97 states have internal predecessors, (454), 0 states have call successors, (0), 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 163 [2021-12-18 19:43:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:30,957 INFO L225 Difference]: With dead ends: 12349 [2021-12-18 19:43:30,957 INFO L226 Difference]: Without dead ends: 12228 [2021-12-18 19:43:30,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 286 SyntacticMatches, 3 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6255 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2108, Invalid=20844, Unknown=0, NotChecked=0, Total=22952 [2021-12-18 19:43:30,959 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 459 mSDsluCounter, 3591 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 3689 SdHoareTripleChecker+Invalid, 3071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:30,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 3689 Invalid, 3071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2582 Invalid, 0 Unknown, 409 Unchecked, 0.8s Time] [2021-12-18 19:43:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12228 states. [2021-12-18 19:43:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12228 to 9193. [2021-12-18 19:43:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9191 states have (on average 1.127080839952127) internal successors, (10359), 9192 states have internal predecessors, (10359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 10359 transitions. [2021-12-18 19:43:31,045 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 10359 transitions. Word has length 163 [2021-12-18 19:43:31,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:31,046 INFO L470 AbstractCegarLoop]: Abstraction has 9193 states and 10359 transitions. [2021-12-18 19:43:31,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.680412371134021) internal successors, (454), 97 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:31,046 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 10359 transitions. [2021-12-18 19:43:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-18 19:43:31,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:31,050 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:31,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-18 19:43:31,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-18 19:43:31,267 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:43:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:31,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2017780305, now seen corresponding path program 11 times [2021-12-18 19:43:31,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:31,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212076456] [2021-12-18 19:43:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:31,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 57 proven. 860 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:43:31,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:31,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212076456] [2021-12-18 19:43:31,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212076456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:31,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971891640] [2021-12-18 19:43:31,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:43:31,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:31,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:31,855 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:31,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-18 19:43:32,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-18 19:43:32,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:43:32,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-18 19:43:32,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:32,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:43:33,240 INFO L388 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 [2021-12-18 19:43:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 57 proven. 866 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:43:33,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:33,526 INFO L388 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 13 [2021-12-18 19:43:33,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:43:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 57 proven. 860 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:43:33,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971891640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:33,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:33,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 34] total 59 [2021-12-18 19:43:33,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235630453] [2021-12-18 19:43:33,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:33,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-18 19:43:33,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-18 19:43:33,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3248, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 19:43:33,752 INFO L87 Difference]: Start difference. First operand 9193 states and 10359 transitions. Second operand has 59 states, 59 states have (on average 4.677966101694915) internal successors, (276), 59 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:36,272 INFO L93 Difference]: Finished difference Result 11826 states and 13162 transitions. [2021-12-18 19:43:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 19:43:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 4.677966101694915) internal successors, (276), 59 states have internal predecessors, (276), 0 states have call successors, (0), 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 169 [2021-12-18 19:43:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:36,281 INFO L225 Difference]: With dead ends: 11826 [2021-12-18 19:43:36,282 INFO L226 Difference]: Without dead ends: 10481 [2021-12-18 19:43:36,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 321 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=435, Invalid=7755, Unknown=0, NotChecked=0, Total=8190 [2021-12-18 19:43:36,283 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 568 mSDsluCounter, 8140 mSDsCounter, 0 mSdLazyCounter, 6562 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 8409 SdHoareTripleChecker+Invalid, 6825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 6562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:36,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 8409 Invalid, 6825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 6562 Invalid, 0 Unknown, 234 Unchecked, 1.7s Time] [2021-12-18 19:43:36,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10481 states. [2021-12-18 19:43:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10481 to 7683. [2021-12-18 19:43:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7681 states have (on average 1.1201666449681031) internal successors, (8604), 7682 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 8604 transitions. [2021-12-18 19:43:36,361 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 8604 transitions. Word has length 169 [2021-12-18 19:43:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:36,361 INFO L470 AbstractCegarLoop]: Abstraction has 7683 states and 8604 transitions. [2021-12-18 19:43:36,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 4.677966101694915) internal successors, (276), 59 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 8604 transitions. [2021-12-18 19:43:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-18 19:43:36,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:36,366 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:36,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-18 19:43:36,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-18 19:43:36,583 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:43:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 423904119, now seen corresponding path program 23 times [2021-12-18 19:43:36,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955624484] [2021-12-18 19:43:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:36,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 651 proven. 463 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:43:37,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:37,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955624484] [2021-12-18 19:43:37,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955624484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:37,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172281920] [2021-12-18 19:43:37,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:43:37,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:37,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:37,144 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:37,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-18 19:43:37,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-18 19:43:37,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:43:37,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-18 19:43:37,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:37,468 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:43:37,468 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:43:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 736 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:43:39,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 736 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:43:40,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172281920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:40,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:40,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 89 [2021-12-18 19:43:40,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297042098] [2021-12-18 19:43:40,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:40,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-18 19:43:40,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:40,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-18 19:43:40,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1213, Invalid=6619, Unknown=0, NotChecked=0, Total=7832 [2021-12-18 19:43:40,437 INFO L87 Difference]: Start difference. First operand 7683 states and 8604 transitions. Second operand has 89 states, 89 states have (on average 4.617977528089888) internal successors, (411), 89 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:48,789 INFO L93 Difference]: Finished difference Result 16359 states and 17770 transitions. [2021-12-18 19:43:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-12-18 19:43:48,790 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 4.617977528089888) internal successors, (411), 89 states have internal predecessors, (411), 0 states have call successors, (0), 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 172 [2021-12-18 19:43:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:48,802 INFO L225 Difference]: With dead ends: 16359 [2021-12-18 19:43:48,802 INFO L226 Difference]: Without dead ends: 15214 [2021-12-18 19:43:48,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17560 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=12453, Invalid=45387, Unknown=0, NotChecked=0, Total=57840 [2021-12-18 19:43:48,806 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 3926 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 3653 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3926 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 3943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 3653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:48,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3926 Valid, 3008 Invalid, 3943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 3653 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-18 19:43:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15214 states. [2021-12-18 19:43:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15214 to 8696. [2021-12-18 19:43:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8696 states, 8694 states have (on average 1.121808143547274) internal successors, (9753), 8695 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8696 states to 8696 states and 9753 transitions. [2021-12-18 19:43:48,928 INFO L78 Accepts]: Start accepts. Automaton has 8696 states and 9753 transitions. Word has length 172 [2021-12-18 19:43:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:48,928 INFO L470 AbstractCegarLoop]: Abstraction has 8696 states and 9753 transitions. [2021-12-18 19:43:48,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 4.617977528089888) internal successors, (411), 89 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 8696 states and 9753 transitions. [2021-12-18 19:43:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-18 19:43:48,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:48,932 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:48,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-18 19:43:49,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:49,146 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:43:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2108414055, now seen corresponding path program 14 times [2021-12-18 19:43:49,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:49,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651130872] [2021-12-18 19:43:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:49,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 145 proven. 500 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:43:49,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:49,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651130872] [2021-12-18 19:43:49,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651130872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:49,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017331855] [2021-12-18 19:43:49,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:43:49,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:49,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:49,587 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:49,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-18 19:43:49,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:43:49,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:43:49,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 19:43:49,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:49,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:43:50,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:43:50,291 INFO L388 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 17 treesize of output 19 [2021-12-18 19:43:50,616 INFO L388 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 [2021-12-18 19:43:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 145 proven. 500 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:43:50,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:50,923 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2771 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2771) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0)) is different from false [2021-12-18 19:43:50,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:43:50,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:43:50,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:43:50,932 INFO L388 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 37 treesize of output 37 [2021-12-18 19:43:50,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:43:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 145 proven. 500 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:43:51,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017331855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:51,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:51,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 43 [2021-12-18 19:43:51,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220035801] [2021-12-18 19:43:51,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:51,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 19:43:51,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 19:43:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1606, Unknown=1, NotChecked=80, Total=1806 [2021-12-18 19:43:51,248 INFO L87 Difference]: Start difference. First operand 8696 states and 9753 transitions. Second operand has 43 states, 43 states have (on average 5.651162790697675) internal successors, (243), 43 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:52,619 INFO L93 Difference]: Finished difference Result 15424 states and 17278 transitions. [2021-12-18 19:43:52,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:43:52,620 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.651162790697675) internal successors, (243), 43 states have internal predecessors, (243), 0 states have call successors, (0), 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 175 [2021-12-18 19:43:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:52,627 INFO L225 Difference]: With dead ends: 15424 [2021-12-18 19:43:52,628 INFO L226 Difference]: Without dead ends: 9696 [2021-12-18 19:43:52,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 328 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=2667, Unknown=1, NotChecked=104, Total=2970 [2021-12-18 19:43:52,628 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 187 mSDsluCounter, 3510 mSDsCounter, 0 mSdLazyCounter, 2732 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 3637 SdHoareTripleChecker+Invalid, 3068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:52,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 3637 Invalid, 3068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2732 Invalid, 0 Unknown, 325 Unchecked, 1.0s Time] [2021-12-18 19:43:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9696 states. [2021-12-18 19:43:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9696 to 8869. [2021-12-18 19:43:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8869 states, 8867 states have (on average 1.121574376903124) internal successors, (9945), 8868 states have internal predecessors, (9945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8869 states to 8869 states and 9945 transitions. [2021-12-18 19:43:52,706 INFO L78 Accepts]: Start accepts. Automaton has 8869 states and 9945 transitions. Word has length 175 [2021-12-18 19:43:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:52,706 INFO L470 AbstractCegarLoop]: Abstraction has 8869 states and 9945 transitions. [2021-12-18 19:43:52,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.651162790697675) internal successors, (243), 43 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 8869 states and 9945 transitions. [2021-12-18 19:43:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-18 19:43:52,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:52,726 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:52,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-12-18 19:43:52,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:52,926 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:43:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:52,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2011472940, now seen corresponding path program 24 times [2021-12-18 19:43:52,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:52,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405224790] [2021-12-18 19:43:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:52,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:43:53,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:53,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405224790] [2021-12-18 19:43:53,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405224790] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:53,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167281110] [2021-12-18 19:43:53,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:43:53,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:53,645 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:53,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-18 19:43:54,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-18 19:43:54,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:43:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-18 19:43:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:55,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:43:55,824 INFO L388 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 [2021-12-18 19:43:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:43:55,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:56,123 INFO L388 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 13 [2021-12-18 19:43:56,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:43:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:43:56,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167281110] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:56,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:56,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 67 [2021-12-18 19:43:56,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009328252] [2021-12-18 19:43:56,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:56,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 19:43:56,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:56,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 19:43:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:43:56,385 INFO L87 Difference]: Start difference. First operand 8869 states and 9945 transitions. Second operand has 67 states, 67 states have (on average 4.08955223880597) internal successors, (274), 67 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) [2021-12-18 19:44:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:44:01,777 INFO L93 Difference]: Finished difference Result 13673 states and 15197 transitions. [2021-12-18 19:44:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-18 19:44:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 4.08955223880597) internal successors, (274), 67 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) Word has length 176 [2021-12-18 19:44:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:44:01,790 INFO L225 Difference]: With dead ends: 13673 [2021-12-18 19:44:01,790 INFO L226 Difference]: Without dead ends: 12321 [2021-12-18 19:44:01,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 322 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=721, Invalid=9991, Unknown=0, NotChecked=0, Total=10712 [2021-12-18 19:44:01,793 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 1714 mSDsluCounter, 12818 mSDsCounter, 0 mSdLazyCounter, 10274 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 13160 SdHoareTripleChecker+Invalid, 10414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 10274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:44:01,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1714 Valid, 13160 Invalid, 10414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 10274 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-18 19:44:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2021-12-18 19:44:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 8905. [2021-12-18 19:44:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8905 states, 8903 states have (on average 1.1211951027743456) internal successors, (9982), 8904 states have internal predecessors, (9982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8905 states to 8905 states and 9982 transitions. [2021-12-18 19:44:01,950 INFO L78 Accepts]: Start accepts. Automaton has 8905 states and 9982 transitions. Word has length 176 [2021-12-18 19:44:01,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:44:01,950 INFO L470 AbstractCegarLoop]: Abstraction has 8905 states and 9982 transitions. [2021-12-18 19:44:01,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 4.08955223880597) internal successors, (274), 67 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) [2021-12-18 19:44:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 8905 states and 9982 transitions. [2021-12-18 19:44:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-18 19:44:01,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:44:01,955 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:44:01,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-18 19:44:02,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:44:02,174 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:44:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:44:02,175 INFO L85 PathProgramCache]: Analyzing trace with hash 556876508, now seen corresponding path program 15 times [2021-12-18 19:44:02,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:44:02,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172599489] [2021-12-18 19:44:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:44:02,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:44:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:44:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 91 proven. 587 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:44:02,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:44:02,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172599489] [2021-12-18 19:44:02,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172599489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:44:02,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190985215] [2021-12-18 19:44:02,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:44:02,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:44:02,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:44:02,568 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:44:02,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-18 19:44:03,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-18 19:44:03,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:44:03,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 19:44:03,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:44:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:44:03,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-12-18 19:44:03,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:44:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 120 proven. 558 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:44:04,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:44:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 153 proven. 525 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:44:06,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190985215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:44:06,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:44:06,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2021-12-18 19:44:06,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128659948] [2021-12-18 19:44:06,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:44:06,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-18 19:44:06,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:44:06,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-18 19:44:06,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=3661, Unknown=0, NotChecked=0, Total=4160 [2021-12-18 19:44:06,076 INFO L87 Difference]: Start difference. First operand 8905 states and 9982 transitions. Second operand has 65 states, 64 states have (on average 7.84375) internal successors, (502), 65 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:44:09,513 INFO L93 Difference]: Finished difference Result 13507 states and 15136 transitions. [2021-12-18 19:44:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 19:44:09,514 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 7.84375) internal successors, (502), 65 states have internal predecessors, (502), 0 states have call successors, (0), 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 179 [2021-12-18 19:44:09,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:44:09,525 INFO L225 Difference]: With dead ends: 13507 [2021-12-18 19:44:09,525 INFO L226 Difference]: Without dead ends: 13507 [2021-12-18 19:44:09,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1954, Invalid=8146, Unknown=0, NotChecked=0, Total=10100 [2021-12-18 19:44:09,528 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1398 mSDsluCounter, 2568 mSDsCounter, 0 mSdLazyCounter, 2741 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:44:09,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 2699 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2741 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-18 19:44:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13507 states. [2021-12-18 19:44:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13507 to 9739. [2021-12-18 19:44:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9739 states, 9737 states have (on average 1.1213926260655234) internal successors, (10919), 9738 states have internal predecessors, (10919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9739 states to 9739 states and 10919 transitions. [2021-12-18 19:44:09,615 INFO L78 Accepts]: Start accepts. Automaton has 9739 states and 10919 transitions. Word has length 179 [2021-12-18 19:44:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:44:09,615 INFO L470 AbstractCegarLoop]: Abstraction has 9739 states and 10919 transitions. [2021-12-18 19:44:09,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 7.84375) internal successors, (502), 65 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9739 states and 10919 transitions. [2021-12-18 19:44:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-18 19:44:09,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:44:09,620 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:44:09,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-18 19:44:09,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:44:09,832 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:44:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:44:09,833 INFO L85 PathProgramCache]: Analyzing trace with hash 180682161, now seen corresponding path program 25 times [2021-12-18 19:44:09,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:44:09,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863036649] [2021-12-18 19:44:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:44:09,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:44:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:44:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 378 proven. 854 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:10,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:44:10,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863036649] [2021-12-18 19:44:10,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863036649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:44:10,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119416390] [2021-12-18 19:44:10,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:44:10,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:44:10,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:44:10,720 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:44:10,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-18 19:44:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:44:10,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-18 19:44:10,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:44:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:12,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:44:13,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:44:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:13,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119416390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:44:13,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:44:13,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 79 [2021-12-18 19:44:13,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328245049] [2021-12-18 19:44:13,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:44:13,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-18 19:44:13,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:44:13,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-18 19:44:13,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=723, Invalid=5597, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 19:44:13,330 INFO L87 Difference]: Start difference. First operand 9739 states and 10919 transitions. Second operand has 80 states, 79 states have (on average 4.658227848101266) internal successors, (368), 80 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:44:18,757 INFO L93 Difference]: Finished difference Result 14468 states and 16064 transitions. [2021-12-18 19:44:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-18 19:44:18,757 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 4.658227848101266) internal successors, (368), 80 states have internal predecessors, (368), 0 states have call successors, (0), 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 180 [2021-12-18 19:44:18,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:44:18,770 INFO L225 Difference]: With dead ends: 14468 [2021-12-18 19:44:18,770 INFO L226 Difference]: Without dead ends: 14468 [2021-12-18 19:44:18,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 316 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2439, Invalid=10443, Unknown=0, NotChecked=0, Total=12882 [2021-12-18 19:44:18,771 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 1787 mSDsluCounter, 5717 mSDsCounter, 0 mSdLazyCounter, 8937 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1787 SdHoareTripleChecker+Valid, 5904 SdHoareTripleChecker+Invalid, 9060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 8937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:44:18,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1787 Valid, 5904 Invalid, 9060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 8937 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-18 19:44:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14468 states. [2021-12-18 19:44:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14468 to 9847. [2021-12-18 19:44:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9847 states, 9845 states have (on average 1.1217877094972066) internal successors, (11044), 9846 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9847 states to 9847 states and 11044 transitions. [2021-12-18 19:44:18,892 INFO L78 Accepts]: Start accepts. Automaton has 9847 states and 11044 transitions. Word has length 180 [2021-12-18 19:44:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:44:18,892 INFO L470 AbstractCegarLoop]: Abstraction has 9847 states and 11044 transitions. [2021-12-18 19:44:18,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 4.658227848101266) internal successors, (368), 80 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:18,892 INFO L276 IsEmpty]: Start isEmpty. Operand 9847 states and 11044 transitions. [2021-12-18 19:44:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-18 19:44:18,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:44:18,898 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:44:18,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-18 19:44:19,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:44:19,100 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:44:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:44:19,100 INFO L85 PathProgramCache]: Analyzing trace with hash 653430917, now seen corresponding path program 26 times [2021-12-18 19:44:19,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:44:19,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5295884] [2021-12-18 19:44:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:44:19,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:44:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:44:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:19,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:44:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5295884] [2021-12-18 19:44:19,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5295884] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:44:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309649834] [2021-12-18 19:44:19,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:44:19,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:44:19,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:44:19,954 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:44:19,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-18 19:44:20,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:44:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:44:20,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-18 19:44:20,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:44:20,230 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:44:20,231 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:44:21,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:44:25,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:44:25,259 INFO L388 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 18 treesize of output 18 [2021-12-18 19:44:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 435 proven. 894 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:25,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:44:28,261 INFO L388 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 13 [2021-12-18 19:44:28,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:44:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 496 proven. 833 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:31,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309649834] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:44:31,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:44:31,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 127 [2021-12-18 19:44:31,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435413098] [2021-12-18 19:44:31,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:44:31,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-12-18 19:44:31,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:44:31,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-12-18 19:44:31,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=15006, Unknown=0, NotChecked=0, Total=16002 [2021-12-18 19:44:31,554 INFO L87 Difference]: Start difference. First operand 9847 states and 11044 transitions. Second operand has 127 states, 127 states have (on average 4.330708661417323) internal successors, (550), 127 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:44:40,841 INFO L93 Difference]: Finished difference Result 15946 states and 17765 transitions. [2021-12-18 19:44:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-18 19:44:40,841 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 4.330708661417323) internal successors, (550), 127 states have internal predecessors, (550), 0 states have call successors, (0), 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 186 [2021-12-18 19:44:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:44:40,854 INFO L225 Difference]: With dead ends: 15946 [2021-12-18 19:44:40,854 INFO L226 Difference]: Without dead ends: 15816 [2021-12-18 19:44:40,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 326 SyntacticMatches, 3 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7782 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=2804, Invalid=34638, Unknown=0, NotChecked=0, Total=37442 [2021-12-18 19:44:40,857 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 4035 mSDsluCounter, 13725 mSDsCounter, 0 mSdLazyCounter, 12035 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4035 SdHoareTripleChecker+Valid, 13994 SdHoareTripleChecker+Invalid, 19893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 12035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7714 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:44:40,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4035 Valid, 13994 Invalid, 19893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 12035 Invalid, 0 Unknown, 7714 Unchecked, 4.3s Time] [2021-12-18 19:44:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15816 states. [2021-12-18 19:44:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15816 to 10789. [2021-12-18 19:44:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10789 states, 10787 states have (on average 1.1237600815796793) internal successors, (12122), 10788 states have internal predecessors, (12122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10789 states to 10789 states and 12122 transitions. [2021-12-18 19:44:40,969 INFO L78 Accepts]: Start accepts. Automaton has 10789 states and 12122 transitions. Word has length 186 [2021-12-18 19:44:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:44:40,970 INFO L470 AbstractCegarLoop]: Abstraction has 10789 states and 12122 transitions. [2021-12-18 19:44:40,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 4.330708661417323) internal successors, (550), 127 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10789 states and 12122 transitions. [2021-12-18 19:44:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-18 19:44:40,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:44:40,976 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:44:40,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-18 19:44:41,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-12-18 19:44:41,187 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:44:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:44:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2133573687, now seen corresponding path program 16 times [2021-12-18 19:44:41,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:44:41,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063961716] [2021-12-18 19:44:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:44:41,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:44:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:44:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 163 proven. 639 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:44:41,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:44:41,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063961716] [2021-12-18 19:44:41,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063961716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:44:41,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191656713] [2021-12-18 19:44:41,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:44:41,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:44:41,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:44:41,786 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:44:41,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-18 19:44:42,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:44:42,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:44:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-18 19:44:42,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:44:42,040 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:44:42,041 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:44:42,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:44:42,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:44:42,771 INFO L388 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 16 treesize of output 18 [2021-12-18 19:44:44,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:44,570 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 19:44:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 640 proven. 162 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:44:44,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:44:46,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:44:46,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-18 19:44:46,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:44:46,207 INFO L388 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 33 treesize of output 33 [2021-12-18 19:44:46,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-18 19:44:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 623 proven. 179 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:44:47,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191656713] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:44:47,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:44:47,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 74 [2021-12-18 19:44:47,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821181047] [2021-12-18 19:44:47,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:44:47,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-18 19:44:47,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:44:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-18 19:44:47,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=4926, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 19:44:47,547 INFO L87 Difference]: Start difference. First operand 10789 states and 12122 transitions. Second operand has 74 states, 74 states have (on average 6.9324324324324325) internal successors, (513), 74 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:44:49,796 INFO L93 Difference]: Finished difference Result 21545 states and 24198 transitions. [2021-12-18 19:44:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-18 19:44:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 6.9324324324324325) internal successors, (513), 74 states have internal predecessors, (513), 0 states have call successors, (0), 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 192 [2021-12-18 19:44:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:44:49,811 INFO L225 Difference]: With dead ends: 21545 [2021-12-18 19:44:49,811 INFO L226 Difference]: Without dead ends: 15100 [2021-12-18 19:44:49,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1274, Invalid=12066, Unknown=0, NotChecked=0, Total=13340 [2021-12-18 19:44:49,813 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 608 mSDsluCounter, 4119 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 4251 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:44:49,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 4251 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1533 Invalid, 0 Unknown, 226 Unchecked, 0.6s Time] [2021-12-18 19:44:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15100 states. [2021-12-18 19:44:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15100 to 11089. [2021-12-18 19:44:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11089 states, 11087 states have (on average 1.1237485343194733) internal successors, (12459), 11088 states have internal predecessors, (12459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11089 states to 11089 states and 12459 transitions. [2021-12-18 19:44:49,992 INFO L78 Accepts]: Start accepts. Automaton has 11089 states and 12459 transitions. Word has length 192 [2021-12-18 19:44:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:44:49,993 INFO L470 AbstractCegarLoop]: Abstraction has 11089 states and 12459 transitions. [2021-12-18 19:44:49,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 6.9324324324324325) internal successors, (513), 74 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 11089 states and 12459 transitions. [2021-12-18 19:44:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-18 19:44:50,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:44:50,012 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:44:50,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-18 19:44:50,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-18 19:44:50,216 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:44:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:44:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1371536438, now seen corresponding path program 27 times [2021-12-18 19:44:50,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:44:50,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926900029] [2021-12-18 19:44:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:44:50,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:44:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:44:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:50,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:44:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926900029] [2021-12-18 19:44:50,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926900029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:44:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830663723] [2021-12-18 19:44:50,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:44:50,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:44:50,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:44:50,990 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:44:50,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-18 19:44:51,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-18 19:44:51,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:44:51,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-18 19:44:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:44:52,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:44:52,805 INFO L388 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 [2021-12-18 19:44:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:52,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:44:53,010 INFO L388 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 13 [2021-12-18 19:44:53,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:44:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:53,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830663723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:44:53,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:44:53,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 73 [2021-12-18 19:44:53,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533298183] [2021-12-18 19:44:53,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:44:53,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-18 19:44:53,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:44:53,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-18 19:44:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=5046, Unknown=0, NotChecked=0, Total=5256 [2021-12-18 19:44:53,184 INFO L87 Difference]: Start difference. First operand 11089 states and 12459 transitions. Second operand has 73 states, 73 states have (on average 4.136986301369863) internal successors, (302), 73 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:44:58,200 INFO L93 Difference]: Finished difference Result 20795 states and 23285 transitions. [2021-12-18 19:44:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-18 19:44:58,201 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.136986301369863) internal successors, (302), 73 states have internal predecessors, (302), 0 states have call successors, (0), 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 196 [2021-12-18 19:44:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:44:58,220 INFO L225 Difference]: With dead ends: 20795 [2021-12-18 19:44:58,221 INFO L226 Difference]: Without dead ends: 20638 [2021-12-18 19:44:58,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 360 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2499 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=791, Invalid=12091, Unknown=0, NotChecked=0, Total=12882 [2021-12-18 19:44:58,222 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 1983 mSDsluCounter, 15596 mSDsCounter, 0 mSdLazyCounter, 12267 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1983 SdHoareTripleChecker+Valid, 15987 SdHoareTripleChecker+Invalid, 12636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 12267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:44:58,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1983 Valid, 15987 Invalid, 12636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 12267 Invalid, 0 Unknown, 211 Unchecked, 3.4s Time] [2021-12-18 19:44:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20638 states. [2021-12-18 19:44:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20638 to 14085. [2021-12-18 19:44:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14085 states, 14083 states have (on average 1.1283107292480294) internal successors, (15890), 14084 states have internal predecessors, (15890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14085 states to 14085 states and 15890 transitions. [2021-12-18 19:44:58,375 INFO L78 Accepts]: Start accepts. Automaton has 14085 states and 15890 transitions. Word has length 196 [2021-12-18 19:44:58,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:44:58,376 INFO L470 AbstractCegarLoop]: Abstraction has 14085 states and 15890 transitions. [2021-12-18 19:44:58,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.136986301369863) internal successors, (302), 73 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:44:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 14085 states and 15890 transitions. [2021-12-18 19:44:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-18 19:44:58,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:44:58,384 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:44:58,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-12-18 19:44:58,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-18 19:44:58,603 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:44:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:44:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1398885658, now seen corresponding path program 17 times [2021-12-18 19:44:58,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:44:58,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413129] [2021-12-18 19:44:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:44:58,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:44:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:44:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 120 proven. 719 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:44:58,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:44:58,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413129] [2021-12-18 19:44:58,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:44:58,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220422454] [2021-12-18 19:44:58,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:44:58,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:44:58,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:44:58,984 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:44:58,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-18 19:44:59,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-18 19:44:59,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:44:59,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 19:44:59,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 153 proven. 686 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:45:00,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:00,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-18 19:45:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 153 proven. 686 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:45:01,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220422454] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:01,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:45:01,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 60 [2021-12-18 19:45:01,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650108179] [2021-12-18 19:45:01,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:01,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-18 19:45:01,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:45:01,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-18 19:45:01,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=3166, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:45:01,333 INFO L87 Difference]: Start difference. First operand 14085 states and 15890 transitions. Second operand has 61 states, 60 states have (on average 7.233333333333333) internal successors, (434), 61 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:02,685 INFO L93 Difference]: Finished difference Result 23030 states and 25928 transitions. [2021-12-18 19:45:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:45:02,685 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 7.233333333333333) internal successors, (434), 61 states have internal predecessors, (434), 0 states have call successors, (0), 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 196 [2021-12-18 19:45:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:02,705 INFO L225 Difference]: With dead ends: 23030 [2021-12-18 19:45:02,706 INFO L226 Difference]: Without dead ends: 23030 [2021-12-18 19:45:02,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1448, Invalid=5524, Unknown=0, NotChecked=0, Total=6972 [2021-12-18 19:45:02,707 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 1426 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 3074 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 3168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:02,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1426 Valid, 3366 Invalid, 3168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3074 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 19:45:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23030 states. [2021-12-18 19:45:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23030 to 15047. [2021-12-18 19:45:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15047 states, 15045 states have (on average 1.1282153539381854) internal successors, (16974), 15046 states have internal predecessors, (16974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15047 states to 15047 states and 16974 transitions. [2021-12-18 19:45:02,874 INFO L78 Accepts]: Start accepts. Automaton has 15047 states and 16974 transitions. Word has length 196 [2021-12-18 19:45:02,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:02,874 INFO L470 AbstractCegarLoop]: Abstraction has 15047 states and 16974 transitions. [2021-12-18 19:45:02,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 7.233333333333333) internal successors, (434), 61 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:02,874 INFO L276 IsEmpty]: Start isEmpty. Operand 15047 states and 16974 transitions. [2021-12-18 19:45:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-18 19:45:02,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:02,882 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:02,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-18 19:45:03,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:03,091 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:45:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:03,092 INFO L85 PathProgramCache]: Analyzing trace with hash -128250477, now seen corresponding path program 28 times [2021-12-18 19:45:03,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:45:03,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598367367] [2021-12-18 19:45:03,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:45:03,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:45:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 496 proven. 1070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:45:03,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:45:03,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598367367] [2021-12-18 19:45:03,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598367367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:45:03,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377356508] [2021-12-18 19:45:03,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:45:03,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:03,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:45:03,732 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:45:03,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-18 19:45:04,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:45:04,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:45:04,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-18 19:45:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:04,024 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:45:04,024 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:45:04,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:45:06,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:45:06,639 INFO L388 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 19 treesize of output 19 [2021-12-18 19:45:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 578 proven. 988 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:45:06,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:08,956 INFO L388 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 13 [2021-12-18 19:45:08,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:45:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 630 proven. 936 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:45:12,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377356508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:12,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:45:12,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 46, 46] total 114 [2021-12-18 19:45:12,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934491756] [2021-12-18 19:45:12,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:12,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-12-18 19:45:12,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:45:12,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-12-18 19:45:12,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1339, Invalid=11771, Unknown=0, NotChecked=0, Total=13110 [2021-12-18 19:45:12,318 INFO L87 Difference]: Start difference. First operand 15047 states and 16974 transitions. Second operand has 115 states, 114 states have (on average 4.578947368421052) internal successors, (522), 115 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:23,509 INFO L93 Difference]: Finished difference Result 23146 states and 25948 transitions. [2021-12-18 19:45:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-18 19:45:23,509 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 114 states have (on average 4.578947368421052) internal successors, (522), 115 states have internal predecessors, (522), 0 states have call successors, (0), 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 200 [2021-12-18 19:45:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:23,527 INFO L225 Difference]: With dead ends: 23146 [2021-12-18 19:45:23,527 INFO L226 Difference]: Without dead ends: 23146 [2021-12-18 19:45:23,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 329 SyntacticMatches, 4 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5585 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=6913, Invalid=30529, Unknown=0, NotChecked=0, Total=37442 [2021-12-18 19:45:23,529 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 1910 mSDsluCounter, 9504 mSDsCounter, 0 mSdLazyCounter, 12864 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 9795 SdHoareTripleChecker+Invalid, 13227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 12864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:23,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 9795 Invalid, 13227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 12864 Invalid, 0 Unknown, 189 Unchecked, 5.5s Time] [2021-12-18 19:45:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23146 states. [2021-12-18 19:45:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23146 to 15167. [2021-12-18 19:45:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15167 states, 15165 states have (on average 1.1283877349159248) internal successors, (17112), 15166 states have internal predecessors, (17112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15167 states to 15167 states and 17112 transitions. [2021-12-18 19:45:23,690 INFO L78 Accepts]: Start accepts. Automaton has 15167 states and 17112 transitions. Word has length 200 [2021-12-18 19:45:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:23,690 INFO L470 AbstractCegarLoop]: Abstraction has 15167 states and 17112 transitions. [2021-12-18 19:45:23,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 114 states have (on average 4.578947368421052) internal successors, (522), 115 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 15167 states and 17112 transitions. [2021-12-18 19:45:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-18 19:45:23,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:23,698 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:23,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-12-18 19:45:23,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:23,903 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:45:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:23,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2039690399, now seen corresponding path program 12 times [2021-12-18 19:45:23,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:45:23,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74596564] [2021-12-18 19:45:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:45:23,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:45:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 69 proven. 1365 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:45:24,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:45:24,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74596564] [2021-12-18 19:45:24,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74596564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:45:24,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459247897] [2021-12-18 19:45:24,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:45:24,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:24,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:45:24,637 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:45:24,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-18 19:45:25,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-18 19:45:25,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:45:25,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-18 19:45:25,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:45:26,598 INFO L388 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 [2021-12-18 19:45:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 69 proven. 1365 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:45:26,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:26,885 INFO L388 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 13 [2021-12-18 19:45:26,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:45:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 69 proven. 1365 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:45:27,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459247897] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:27,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:45:27,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 70 [2021-12-18 19:45:27,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082503303] [2021-12-18 19:45:27,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:27,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-18 19:45:27,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:45:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-18 19:45:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4628, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 19:45:27,147 INFO L87 Difference]: Start difference. First operand 15167 states and 17112 transitions. Second operand has 70 states, 70 states have (on average 4.628571428571429) internal successors, (324), 70 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:33,156 INFO L93 Difference]: Finished difference Result 22020 states and 24651 transitions. [2021-12-18 19:45:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-18 19:45:33,157 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.628571428571429) internal successors, (324), 70 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-12-18 19:45:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:33,178 INFO L225 Difference]: With dead ends: 22020 [2021-12-18 19:45:33,179 INFO L226 Difference]: Without dead ends: 19718 [2021-12-18 19:45:33,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 375 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=756, Invalid=11016, Unknown=0, NotChecked=0, Total=11772 [2021-12-18 19:45:33,194 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 1972 mSDsluCounter, 14513 mSDsCounter, 0 mSdLazyCounter, 11397 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1972 SdHoareTripleChecker+Valid, 14879 SdHoareTripleChecker+Invalid, 11869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 11397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:33,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1972 Valid, 14879 Invalid, 11869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 11397 Invalid, 0 Unknown, 290 Unchecked, 4.2s Time] [2021-12-18 19:45:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19718 states. [2021-12-18 19:45:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19718 to 15507. [2021-12-18 19:45:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15507 states, 15505 states have (on average 1.127700741696227) internal successors, (17485), 15506 states have internal predecessors, (17485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15507 states to 15507 states and 17485 transitions. [2021-12-18 19:45:33,405 INFO L78 Accepts]: Start accepts. Automaton has 15507 states and 17485 transitions. Word has length 203 [2021-12-18 19:45:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:33,405 INFO L470 AbstractCegarLoop]: Abstraction has 15507 states and 17485 transitions. [2021-12-18 19:45:33,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.628571428571429) internal successors, (324), 70 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 15507 states and 17485 transitions. [2021-12-18 19:45:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-18 19:45:33,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:33,413 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:33,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-12-18 19:45:33,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:33,623 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:45:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash -423890782, now seen corresponding path program 13 times [2021-12-18 19:45:33,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:45:33,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724329747] [2021-12-18 19:45:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:45:33,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:45:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 435 proven. 1064 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:45:34,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:45:34,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724329747] [2021-12-18 19:45:34,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724329747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:45:34,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766604631] [2021-12-18 19:45:34,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:45:34,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:45:34,375 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:45:34,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-18 19:45:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:34,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-18 19:45:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 496 proven. 1003 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:45:35,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:37,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:45:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 496 proven. 1003 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:45:37,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766604631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:37,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:45:37,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 82 [2021-12-18 19:45:37,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022464262] [2021-12-18 19:45:37,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:37,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-18 19:45:37,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:45:37,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-18 19:45:37,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=6182, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 19:45:37,229 INFO L87 Difference]: Start difference. First operand 15507 states and 17485 transitions. Second operand has 83 states, 82 states have (on average 5.170731707317073) internal successors, (424), 83 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:43,718 INFO L93 Difference]: Finished difference Result 23076 states and 25636 transitions. [2021-12-18 19:45:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-18 19:45:43,718 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 5.170731707317073) internal successors, (424), 83 states have internal predecessors, (424), 0 states have call successors, (0), 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 207 [2021-12-18 19:45:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:43,741 INFO L225 Difference]: With dead ends: 23076 [2021-12-18 19:45:43,741 INFO L226 Difference]: Without dead ends: 20691 [2021-12-18 19:45:43,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 367 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2689 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3436, Invalid=14654, Unknown=0, NotChecked=0, Total=18090 [2021-12-18 19:45:43,743 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 2336 mSDsluCounter, 5594 mSDsCounter, 0 mSdLazyCounter, 8810 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2336 SdHoareTripleChecker+Valid, 5793 SdHoareTripleChecker+Invalid, 8996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 8810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:43,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2336 Valid, 5793 Invalid, 8996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 8810 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-18 19:45:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20691 states. [2021-12-18 19:45:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20691 to 13822. [2021-12-18 19:45:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13820 states have (on average 1.1248191027496381) internal successors, (15545), 13821 states have internal predecessors, (15545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 15545 transitions. [2021-12-18 19:45:44,056 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 15545 transitions. Word has length 207 [2021-12-18 19:45:44,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:44,056 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 15545 transitions. [2021-12-18 19:45:44,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 5.170731707317073) internal successors, (424), 83 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 15545 transitions. [2021-12-18 19:45:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-18 19:45:44,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:44,065 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:44,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-12-18 19:45:44,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:44,283 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:45:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:44,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1989758977, now seen corresponding path program 18 times [2021-12-18 19:45:44,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:45:44,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897466046] [2021-12-18 19:45:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:45:44,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:45:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 181 proven. 795 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:45:44,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:45:44,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897466046] [2021-12-18 19:45:44,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897466046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:45:44,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789759333] [2021-12-18 19:45:44,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:45:44,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:44,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:45:44,811 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:45:44,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-18 19:45:45,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-18 19:45:45,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:45:45,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-18 19:45:45,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:45,302 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:45:45,303 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:45:45,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:45:45,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:45:45,698 INFO L388 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 17 treesize of output 19 [2021-12-18 19:45:49,435 INFO L354 Elim1Store]: treesize reduction 1, result has 97.4 percent of original size [2021-12-18 19:45:49,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-12-18 19:45:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 145 proven. 31 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-12-18 19:45:49,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:54,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:45:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2021-12-18 19:45:54,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:45:54,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2021-12-18 19:45:54,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:45:54,253 INFO L388 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 64 treesize of output 62 [2021-12-18 19:45:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-12-18 19:45:55,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789759333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:55,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:45:55,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13, 13] total 52 [2021-12-18 19:45:55,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897819872] [2021-12-18 19:45:55,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:55,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-18 19:45:55,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:45:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-18 19:45:55,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2466, Unknown=30, NotChecked=0, Total=2652 [2021-12-18 19:45:55,037 INFO L87 Difference]: Start difference. First operand 13822 states and 15545 transitions. Second operand has 52 states, 52 states have (on average 5.615384615384615) internal successors, (292), 52 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:00,187 INFO L93 Difference]: Finished difference Result 15805 states and 17661 transitions. [2021-12-18 19:46:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-18 19:46:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.615384615384615) internal successors, (292), 52 states have internal predecessors, (292), 0 states have call successors, (0), 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 209 [2021-12-18 19:46:00,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:00,190 INFO L225 Difference]: With dead ends: 15805 [2021-12-18 19:46:00,190 INFO L226 Difference]: Without dead ends: 3628 [2021-12-18 19:46:00,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 395 SyntacticMatches, 10 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7561 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1357, Invalid=27681, Unknown=32, NotChecked=0, Total=29070 [2021-12-18 19:46:00,193 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 103 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 3173 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:00,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 3173 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1926 Invalid, 0 Unknown, 551 Unchecked, 0.5s Time] [2021-12-18 19:46:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3628 states. [2021-12-18 19:46:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3628 to 2338. [2021-12-18 19:46:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 1.0945656824989303) internal successors, (2558), 2337 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 2558 transitions. [2021-12-18 19:46:00,207 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 2558 transitions. Word has length 209 [2021-12-18 19:46:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:00,208 INFO L470 AbstractCegarLoop]: Abstraction has 2338 states and 2558 transitions. [2021-12-18 19:46:00,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.615384615384615) internal successors, (292), 52 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 2558 transitions. [2021-12-18 19:46:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-18 19:46:00,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:00,210 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:00,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-12-18 19:46:00,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:00,415 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:46:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1131872571, now seen corresponding path program 29 times [2021-12-18 19:46:00,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:00,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19392538] [2021-12-18 19:46:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:00,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 1051 proven. 739 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:00,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:00,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19392538] [2021-12-18 19:46:00,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19392538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:00,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706385747] [2021-12-18 19:46:00,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:46:00,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:00,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:00,901 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:00,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-18 19:46:01,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-12-18 19:46:01,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:46:01,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-18 19:46:01,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:01,352 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:46:01,353 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:46:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 1160 proven. 630 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:02,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 1160 proven. 630 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:04,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706385747] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:04,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:04,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 110 [2021-12-18 19:46:04,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383726112] [2021-12-18 19:46:04,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:04,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-18 19:46:04,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:04,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-18 19:46:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2081, Invalid=9909, Unknown=0, NotChecked=0, Total=11990 [2021-12-18 19:46:04,342 INFO L87 Difference]: Start difference. First operand 2338 states and 2558 transitions. Second operand has 110 states, 110 states have (on average 4.609090909090909) internal successors, (507), 110 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:05,580 INFO L93 Difference]: Finished difference Result 5675 states and 6235 transitions. [2021-12-18 19:46:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-18 19:46:05,581 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 4.609090909090909) internal successors, (507), 110 states have internal predecessors, (507), 0 states have call successors, (0), 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 212 [2021-12-18 19:46:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:05,585 INFO L225 Difference]: With dead ends: 5675 [2021-12-18 19:46:05,585 INFO L226 Difference]: Without dead ends: 5544 [2021-12-18 19:46:05,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6966 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3579, Invalid=14243, Unknown=0, NotChecked=0, Total=17822 [2021-12-18 19:46:05,587 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 410 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:05,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 1169 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:46:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5544 states. [2021-12-18 19:46:05,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5544 to 4691. [2021-12-18 19:46:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 1.120042643923241) internal successors, (5253), 4690 states have internal predecessors, (5253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 5253 transitions. [2021-12-18 19:46:05,625 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 5253 transitions. Word has length 212 [2021-12-18 19:46:05,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:05,625 INFO L470 AbstractCegarLoop]: Abstraction has 4691 states and 5253 transitions. [2021-12-18 19:46:05,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 4.609090909090909) internal successors, (507), 110 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 5253 transitions. [2021-12-18 19:46:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-18 19:46:05,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:05,628 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:05,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-18 19:46:05,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-12-18 19:46:05,847 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:46:05,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash -377112424, now seen corresponding path program 30 times [2021-12-18 19:46:05,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:05,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683930050] [2021-12-18 19:46:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:05,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:06,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:06,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683930050] [2021-12-18 19:46:06,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683930050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:06,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510855247] [2021-12-18 19:46:06,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:46:06,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:06,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:06,840 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:06,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-18 19:46:08,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-18 19:46:08,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:46:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-18 19:46:08,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:08,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:46:09,056 INFO L388 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 [2021-12-18 19:46:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:09,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:09,460 INFO L388 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 13 [2021-12-18 19:46:09,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:46:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:09,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510855247] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:09,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:09,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 79 [2021-12-18 19:46:09,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678416902] [2021-12-18 19:46:09,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:09,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-18 19:46:09,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:09,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-18 19:46:09,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=5936, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 19:46:09,773 INFO L87 Difference]: Start difference. First operand 4691 states and 5253 transitions. Second operand has 79 states, 79 states have (on average 4.177215189873418) internal successors, (330), 79 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) [2021-12-18 19:46:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:14,321 INFO L93 Difference]: Finished difference Result 8049 states and 8959 transitions. [2021-12-18 19:46:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-18 19:46:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 4.177215189873418) internal successors, (330), 79 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) Word has length 216 [2021-12-18 19:46:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:14,328 INFO L225 Difference]: With dead ends: 8049 [2021-12-18 19:46:14,329 INFO L226 Difference]: Without dead ends: 7898 [2021-12-18 19:46:14,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 398 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2940 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=861, Invalid=14391, Unknown=0, NotChecked=0, Total=15252 [2021-12-18 19:46:14,330 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1554 mSDsluCounter, 8466 mSDsCounter, 0 mSdLazyCounter, 10639 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 8628 SdHoareTripleChecker+Invalid, 11082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 10639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:14,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 8628 Invalid, 11082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 10639 Invalid, 0 Unknown, 266 Unchecked, 2.8s Time] [2021-12-18 19:46:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7898 states. [2021-12-18 19:46:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7898 to 4735. [2021-12-18 19:46:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 1.121039290240811) internal successors, (5307), 4734 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 5307 transitions. [2021-12-18 19:46:14,381 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 5307 transitions. Word has length 216 [2021-12-18 19:46:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:14,381 INFO L470 AbstractCegarLoop]: Abstraction has 4735 states and 5307 transitions. [2021-12-18 19:46:14,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 4.177215189873418) internal successors, (330), 79 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) [2021-12-18 19:46:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 5307 transitions. [2021-12-18 19:46:14,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-18 19:46:14,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:14,385 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:14,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-18 19:46:14,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:14,617 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:46:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:14,618 INFO L85 PathProgramCache]: Analyzing trace with hash -263872775, now seen corresponding path program 14 times [2021-12-18 19:46:14,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:14,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480456313] [2021-12-18 19:46:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:14,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 496 proven. 1181 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:46:15,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480456313] [2021-12-18 19:46:15,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480456313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962667818] [2021-12-18 19:46:15,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:46:15,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:15,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:15,452 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:15,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-18 19:46:15,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:46:15,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:46:15,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-18 19:46:15,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 561 proven. 1116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:46:16,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:17,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:46:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 561 proven. 1116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:46:18,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962667818] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:18,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:18,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 87 [2021-12-18 19:46:18,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698455049] [2021-12-18 19:46:18,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:18,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-18 19:46:18,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-18 19:46:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=879, Invalid=6777, Unknown=0, NotChecked=0, Total=7656 [2021-12-18 19:46:18,096 INFO L87 Difference]: Start difference. First operand 4735 states and 5307 transitions. Second operand has 88 states, 87 states have (on average 5.103448275862069) internal successors, (444), 88 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:20,198 INFO L93 Difference]: Finished difference Result 7426 states and 8141 transitions. [2021-12-18 19:46:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-18 19:46:20,199 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 5.103448275862069) internal successors, (444), 88 states have internal predecessors, (444), 0 states have call successors, (0), 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 217 [2021-12-18 19:46:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:20,204 INFO L225 Difference]: With dead ends: 7426 [2021-12-18 19:46:20,204 INFO L226 Difference]: Without dead ends: 7426 [2021-12-18 19:46:20,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 385 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2161, Invalid=9829, Unknown=0, NotChecked=0, Total=11990 [2021-12-18 19:46:20,205 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 2393 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 4404 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2393 SdHoareTripleChecker+Valid, 3345 SdHoareTripleChecker+Invalid, 4649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 4404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:20,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2393 Valid, 3345 Invalid, 4649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 4404 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-18 19:46:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-12-18 19:46:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 4735. [2021-12-18 19:46:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 1.1191381495564006) internal successors, (5298), 4734 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 5298 transitions. [2021-12-18 19:46:20,259 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 5298 transitions. Word has length 217 [2021-12-18 19:46:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:20,259 INFO L470 AbstractCegarLoop]: Abstraction has 4735 states and 5298 transitions. [2021-12-18 19:46:20,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 5.103448275862069) internal successors, (444), 88 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 5298 transitions. [2021-12-18 19:46:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-18 19:46:20,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:20,263 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:20,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-18 19:46:20,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-12-18 19:46:20,467 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:46:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:20,467 INFO L85 PathProgramCache]: Analyzing trace with hash -260081291, now seen corresponding path program 31 times [2021-12-18 19:46:20,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:20,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531267875] [2021-12-18 19:46:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:20,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 630 proven. 1310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:21,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:21,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531267875] [2021-12-18 19:46:21,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531267875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:21,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563367345] [2021-12-18 19:46:21,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:46:21,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:21,113 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:21,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-18 19:46:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:21,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-18 19:46:21,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:22,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:23,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:46:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:23,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563367345] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:23,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:23,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 94 [2021-12-18 19:46:23,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391449812] [2021-12-18 19:46:23,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:23,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-18 19:46:23,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:23,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-18 19:46:23,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=816, Invalid=8114, Unknown=0, NotChecked=0, Total=8930 [2021-12-18 19:46:23,438 INFO L87 Difference]: Start difference. First operand 4735 states and 5298 transitions. Second operand has 95 states, 94 states have (on average 4.76595744680851) internal successors, (448), 95 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:27,055 INFO L93 Difference]: Finished difference Result 9136 states and 10190 transitions. [2021-12-18 19:46:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 19:46:27,056 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 4.76595744680851) internal successors, (448), 95 states have internal predecessors, (448), 0 states have call successors, (0), 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 220 [2021-12-18 19:46:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:27,063 INFO L225 Difference]: With dead ends: 9136 [2021-12-18 19:46:27,063 INFO L226 Difference]: Without dead ends: 9136 [2021-12-18 19:46:27,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 388 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3560, Invalid=15900, Unknown=0, NotChecked=0, Total=19460 [2021-12-18 19:46:27,065 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 2090 mSDsluCounter, 4468 mSDsCounter, 0 mSdLazyCounter, 6090 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 4638 SdHoareTripleChecker+Invalid, 6254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 6090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:27,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2090 Valid, 4638 Invalid, 6254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 6090 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-18 19:46:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2021-12-18 19:46:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 4759. [2021-12-18 19:46:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4759 states, 4758 states have (on average 1.1204287515762925) internal successors, (5331), 4758 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4759 states to 4759 states and 5331 transitions. [2021-12-18 19:46:27,122 INFO L78 Accepts]: Start accepts. Automaton has 4759 states and 5331 transitions. Word has length 220 [2021-12-18 19:46:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:27,122 INFO L470 AbstractCegarLoop]: Abstraction has 4759 states and 5331 transitions. [2021-12-18 19:46:27,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 4.76595744680851) internal successors, (448), 95 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4759 states and 5331 transitions. [2021-12-18 19:46:27,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-18 19:46:27,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:27,125 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:27,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-12-18 19:46:27,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-12-18 19:46:27,343 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:46:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1737024563, now seen corresponding path program 15 times [2021-12-18 19:46:27,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:27,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521005468] [2021-12-18 19:46:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:27,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 77 proven. 1715 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:46:27,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:27,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521005468] [2021-12-18 19:46:27,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521005468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:27,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021077070] [2021-12-18 19:46:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:46:27,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:27,902 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:27,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-18 19:46:28,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-12-18 19:46:28,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:46:28,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-18 19:46:28,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:29,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:46:30,040 INFO L388 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 [2021-12-18 19:46:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 77 proven. 1715 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:46:30,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:30,288 INFO L388 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 13 [2021-12-18 19:46:30,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:46:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 77 proven. 1715 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:46:30,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021077070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:30,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:30,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 76 [2021-12-18 19:46:30,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134352133] [2021-12-18 19:46:30,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:30,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-18 19:46:30,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:30,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-18 19:46:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5482, Unknown=0, NotChecked=0, Total=5700 [2021-12-18 19:46:30,510 INFO L87 Difference]: Start difference. First operand 4759 states and 5331 transitions. Second operand has 76 states, 76 states have (on average 4.631578947368421) internal successors, (352), 76 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) [2021-12-18 19:46:35,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:35,088 INFO L93 Difference]: Finished difference Result 7778 states and 8647 transitions. [2021-12-18 19:46:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-18 19:46:35,089 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.631578947368421) internal successors, (352), 76 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) Word has length 223 [2021-12-18 19:46:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:35,092 INFO L225 Difference]: With dead ends: 7778 [2021-12-18 19:46:35,092 INFO L226 Difference]: Without dead ends: 4759 [2021-12-18 19:46:35,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 413 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2709 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=826, Invalid=13216, Unknown=0, NotChecked=0, Total=14042 [2021-12-18 19:46:35,093 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1252 mSDsluCounter, 6956 mSDsCounter, 0 mSdLazyCounter, 8961 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 7096 SdHoareTripleChecker+Invalid, 9310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 8961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:35,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 7096 Invalid, 9310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 8961 Invalid, 0 Unknown, 181 Unchecked, 2.8s Time] [2021-12-18 19:46:35,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-12-18 19:46:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 4759. [2021-12-18 19:46:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4759 states, 4758 states have (on average 1.1183270281630937) internal successors, (5321), 4758 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4759 states to 4759 states and 5321 transitions. [2021-12-18 19:46:35,121 INFO L78 Accepts]: Start accepts. Automaton has 4759 states and 5321 transitions. Word has length 223 [2021-12-18 19:46:35,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:35,121 INFO L470 AbstractCegarLoop]: Abstraction has 4759 states and 5321 transitions. [2021-12-18 19:46:35,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.631578947368421) internal successors, (352), 76 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) [2021-12-18 19:46:35,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4759 states and 5321 transitions. [2021-12-18 19:46:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-18 19:46:35,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:35,125 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:35,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-12-18 19:46:35,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:35,343 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:46:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:35,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2011834697, now seen corresponding path program 32 times [2021-12-18 19:46:35,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:35,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080477237] [2021-12-18 19:46:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:35,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:36,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:36,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080477237] [2021-12-18 19:46:36,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080477237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:36,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136232351] [2021-12-18 19:46:36,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:46:36,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:36,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:36,309 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:36,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-18 19:46:36,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:46:36,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:46:36,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-18 19:46:36,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:37,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:46:40,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:46:40,545 INFO L388 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 18 treesize of output 18 [2021-12-18 19:46:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 703 proven. 1358 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:40,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:43,667 INFO L388 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 13 [2021-12-18 19:46:43,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 19:46:43,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:46:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 703 proven. 1358 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:43,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136232351] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:43,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:43,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 128 [2021-12-18 19:46:43,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520836140] [2021-12-18 19:46:43,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:43,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-18 19:46:43,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:43,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-18 19:46:43,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=15216, Unknown=0, NotChecked=0, Total=16256 [2021-12-18 19:46:43,932 INFO L87 Difference]: Start difference. First operand 4759 states and 5321 transitions. Second operand has 128 states, 128 states have (on average 4.5390625) internal successors, (581), 128 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:49,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:49,953 INFO L93 Difference]: Finished difference Result 7957 states and 8869 transitions. [2021-12-18 19:46:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-18 19:46:49,953 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 4.5390625) internal successors, (581), 128 states have internal predecessors, (581), 0 states have call successors, (0), 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 226 [2021-12-18 19:46:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:49,960 INFO L225 Difference]: With dead ends: 7957 [2021-12-18 19:46:49,960 INFO L226 Difference]: Without dead ends: 7800 [2021-12-18 19:46:49,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 423 SyntacticMatches, 4 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7393 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1655, Invalid=23785, Unknown=0, NotChecked=0, Total=25440 [2021-12-18 19:46:49,963 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1149 mSDsluCounter, 7519 mSDsCounter, 0 mSdLazyCounter, 4296 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 7668 SdHoareTripleChecker+Invalid, 7009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2667 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:49,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 7668 Invalid, 7009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4296 Invalid, 0 Unknown, 2667 Unchecked, 1.6s Time] [2021-12-18 19:46:49,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2021-12-18 19:46:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6055. [2021-12-18 19:46:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 6054 states have (on average 1.1245457548728113) internal successors, (6808), 6054 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 6808 transitions. [2021-12-18 19:46:50,025 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 6808 transitions. Word has length 226 [2021-12-18 19:46:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:50,025 INFO L470 AbstractCegarLoop]: Abstraction has 6055 states and 6808 transitions. [2021-12-18 19:46:50,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 4.5390625) internal successors, (581), 128 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 6808 transitions. [2021-12-18 19:46:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-18 19:46:50,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:50,030 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:50,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-12-18 19:46:50,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:50,235 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:46:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:50,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1538570320, now seen corresponding path program 16 times [2021-12-18 19:46:50,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:50,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077132910] [2021-12-18 19:46:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:50,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 561 proven. 1304 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:46:51,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:51,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077132910] [2021-12-18 19:46:51,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077132910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:51,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520901357] [2021-12-18 19:46:51,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:46:51,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:51,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:51,042 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:51,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-18 19:46:51,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:46:51,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:46:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 124 conjunts are in the unsatisfiable core [2021-12-18 19:46:51,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:51,348 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:46:51,349 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:46:51,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:46:53,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:46:53,636 INFO L388 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 19 treesize of output 19 [2021-12-18 19:46:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 648 proven. 1217 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:46:53,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:56,338 INFO L388 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 13 [2021-12-18 19:46:56,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:46:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 703 proven. 1162 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:46:59,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520901357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:59,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:59,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 48, 48] total 119 [2021-12-18 19:46:59,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90197269] [2021-12-18 19:46:59,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:59,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-12-18 19:46:59,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:59,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-12-18 19:46:59,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=12824, Unknown=0, NotChecked=0, Total=14280 [2021-12-18 19:46:59,605 INFO L87 Difference]: Start difference. First operand 6055 states and 6808 transitions. Second operand has 120 states, 119 states have (on average 4.907563025210084) internal successors, (584), 120 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:47:04,160 INFO L93 Difference]: Finished difference Result 8944 states and 9864 transitions. [2021-12-18 19:47:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-18 19:47:04,160 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 4.907563025210084) internal successors, (584), 120 states have internal predecessors, (584), 0 states have call successors, (0), 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 227 [2021-12-18 19:47:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:47:04,165 INFO L225 Difference]: With dead ends: 8944 [2021-12-18 19:47:04,165 INFO L226 Difference]: Without dead ends: 5825 [2021-12-18 19:47:04,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 374 SyntacticMatches, 4 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3487, Invalid=18863, Unknown=0, NotChecked=0, Total=22350 [2021-12-18 19:47:04,167 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 3475 mSDsluCounter, 5321 mSDsCounter, 0 mSdLazyCounter, 7253 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 5469 SdHoareTripleChecker+Invalid, 7675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 7253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:47:04,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3475 Valid, 5469 Invalid, 7675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 7253 Invalid, 0 Unknown, 74 Unchecked, 2.4s Time] [2021-12-18 19:47:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5825 states. [2021-12-18 19:47:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5825 to 3746. [2021-12-18 19:47:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 3745 states have (on average 1.1124165554072096) internal successors, (4166), 3745 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 4166 transitions. [2021-12-18 19:47:04,222 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 4166 transitions. Word has length 227 [2021-12-18 19:47:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:47:04,222 INFO L470 AbstractCegarLoop]: Abstraction has 3746 states and 4166 transitions. [2021-12-18 19:47:04,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 4.907563025210084) internal successors, (584), 120 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 4166 transitions. [2021-12-18 19:47:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-18 19:47:04,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:47:04,226 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:47:04,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-12-18 19:47:04,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-12-18 19:47:04,448 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:47:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:47:04,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1998393594, now seen corresponding path program 33 times [2021-12-18 19:47:04,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:47:04,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510833066] [2021-12-18 19:47:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:47:04,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:47:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:47:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:47:05,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:47:05,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510833066] [2021-12-18 19:47:05,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510833066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:47:05,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777950918] [2021-12-18 19:47:05,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:47:05,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:47:05,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:47:05,452 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:47:05,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-18 19:47:07,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-12-18 19:47:07,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:47:07,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-18 19:47:07,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:47:07,242 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:47:07,242 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:47:08,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:48:47,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:48:47,550 INFO L388 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 18 treesize of output 18 [2021-12-18 19:48:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 1338 proven. 924 refuted. 7 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:48:47,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:48:50,651 INFO L388 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 13 treesize of output 11 [2021-12-18 19:48:50,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:48:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 1345 proven. 924 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:48:53,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777950918] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:48:53,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:48:53,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 155 [2021-12-18 19:48:53,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643497751] [2021-12-18 19:48:53,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:48:53,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-12-18 19:48:53,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:48:53,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-12-18 19:48:53,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1934, Invalid=21934, Unknown=2, NotChecked=0, Total=23870 [2021-12-18 19:48:53,783 INFO L87 Difference]: Start difference. First operand 3746 states and 4166 transitions. Second operand has 155 states, 155 states have (on average 4.47741935483871) internal successors, (694), 155 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:02,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:02,209 INFO L93 Difference]: Finished difference Result 5567 states and 6178 transitions. [2021-12-18 19:49:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-18 19:49:02,210 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 4.47741935483871) internal successors, (694), 155 states have internal predecessors, (694), 0 states have call successors, (0), 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 236 [2021-12-18 19:49:02,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:02,214 INFO L225 Difference]: With dead ends: 5567 [2021-12-18 19:49:02,214 INFO L226 Difference]: Without dead ends: 5404 [2021-12-18 19:49:02,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13509 ImplicationChecksByTransitivity, 109.0s TimeCoverageRelationStatistics Valid=3554, Invalid=40752, Unknown=4, NotChecked=0, Total=44310 [2021-12-18 19:49:02,216 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 459 mSDsluCounter, 6488 mSDsCounter, 0 mSdLazyCounter, 4062 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 6630 SdHoareTripleChecker+Invalid, 4748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 4062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 602 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:02,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 6630 Invalid, 4748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 4062 Invalid, 0 Unknown, 602 Unchecked, 1.0s Time] [2021-12-18 19:49:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2021-12-18 19:49:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 3920. [2021-12-18 19:49:02,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 1.1125287063026281) internal successors, (4360), 3919 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 4360 transitions. [2021-12-18 19:49:02,263 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 4360 transitions. Word has length 236 [2021-12-18 19:49:02,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:02,263 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 4360 transitions. [2021-12-18 19:49:02,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 4.47741935483871) internal successors, (694), 155 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 4360 transitions. [2021-12-18 19:49:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-18 19:49:02,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:02,267 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:02,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-18 19:49:02,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:02,487 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:49:02,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash -540884649, now seen corresponding path program 34 times [2021-12-18 19:49:02,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:02,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774096054] [2021-12-18 19:49:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:02,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 780 proven. 1574 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:49:03,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:03,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774096054] [2021-12-18 19:49:03,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774096054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:03,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531897964] [2021-12-18 19:49:03,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:49:03,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:03,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:03,477 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:49:03,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-18 19:49:03,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:49:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 139 conjunts are in the unsatisfiable core [2021-12-18 19:49:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:03,791 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:49:03,792 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:49:04,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:49:06,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:49:06,551 INFO L388 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 19 treesize of output 19 [2021-12-18 19:49:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 882 proven. 1472 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:49:06,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:09,389 INFO L388 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 13 [2021-12-18 19:49:09,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:49:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 946 proven. 1408 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:49:13,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531897964] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:13,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:13,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 54, 54] total 134 [2021-12-18 19:49:13,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153608464] [2021-12-18 19:49:13,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:13,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-12-18 19:49:13,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:13,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-12-18 19:49:13,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1837, Invalid=16253, Unknown=0, NotChecked=0, Total=18090 [2021-12-18 19:49:13,322 INFO L87 Difference]: Start difference. First operand 3920 states and 4360 transitions. Second operand has 135 states, 134 states have (on average 4.6716417910447765) internal successors, (626), 135 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:23,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:23,380 INFO L93 Difference]: Finished difference Result 11906 states and 13088 transitions. [2021-12-18 19:49:23,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-18 19:49:23,380 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 134 states have (on average 4.6716417910447765) internal successors, (626), 135 states have internal predecessors, (626), 0 states have call successors, (0), 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 240 [2021-12-18 19:49:23,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:23,389 INFO L225 Difference]: With dead ends: 11906 [2021-12-18 19:49:23,389 INFO L226 Difference]: Without dead ends: 11906 [2021-12-18 19:49:23,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 394 SyntacticMatches, 4 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7900 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=7882, Invalid=39424, Unknown=0, NotChecked=0, Total=47306 [2021-12-18 19:49:23,391 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 3772 mSDsluCounter, 10947 mSDsCounter, 0 mSdLazyCounter, 13595 mSolverCounterSat, 1372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3772 SdHoareTripleChecker+Valid, 11209 SdHoareTripleChecker+Invalid, 15351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1372 IncrementalHoareTripleChecker+Valid, 13595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:23,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3772 Valid, 11209 Invalid, 15351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1372 Valid, 13595 Invalid, 0 Unknown, 384 Unchecked, 5.3s Time] [2021-12-18 19:49:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11906 states. [2021-12-18 19:49:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11906 to 5236. [2021-12-18 19:49:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5235 states have (on average 1.1228271251193886) internal successors, (5878), 5235 states have internal predecessors, (5878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 5878 transitions. [2021-12-18 19:49:23,468 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 5878 transitions. Word has length 240 [2021-12-18 19:49:23,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:23,468 INFO L470 AbstractCegarLoop]: Abstraction has 5236 states and 5878 transitions. [2021-12-18 19:49:23,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 134 states have (on average 4.6716417910447765) internal successors, (626), 135 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:23,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 5878 transitions. [2021-12-18 19:49:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-18 19:49:23,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:23,472 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:23,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-12-18 19:49:23,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:23,688 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:49:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:23,688 INFO L85 PathProgramCache]: Analyzing trace with hash -170938629, now seen corresponding path program 17 times [2021-12-18 19:49:23,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:23,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897846586] [2021-12-18 19:49:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:23,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2198 backedges. 85 proven. 2105 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:49:24,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897846586] [2021-12-18 19:49:24,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897846586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190684679] [2021-12-18 19:49:24,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:49:24,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:24,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:24,588 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:49:24,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-18 19:49:25,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-18 19:49:25,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:25,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 134 conjunts are in the unsatisfiable core [2021-12-18 19:49:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:25,334 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:49:25,334 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:49:26,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:49:29,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:49:29,398 INFO L388 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 17 treesize of output 17 [2021-12-18 19:49:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2198 backedges. 703 proven. 1487 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:49:29,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:32,703 INFO L388 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 13 [2021-12-18 19:49:32,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:49:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2198 backedges. 780 proven. 1410 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:49:35,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190684679] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:35,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:35,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 149 [2021-12-18 19:49:35,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675578358] [2021-12-18 19:49:35,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:35,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-12-18 19:49:35,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:35,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-12-18 19:49:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1394, Invalid=20658, Unknown=0, NotChecked=0, Total=22052 [2021-12-18 19:49:35,556 INFO L87 Difference]: Start difference. First operand 5236 states and 5878 transitions. Second operand has 149 states, 149 states have (on average 4.738255033557047) internal successors, (706), 149 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:40,666 INFO L93 Difference]: Finished difference Result 11634 states and 13102 transitions. [2021-12-18 19:49:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-18 19:49:40,666 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 4.738255033557047) internal successors, (706), 149 states have internal predecessors, (706), 0 states have call successors, (0), 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 243 [2021-12-18 19:49:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:40,676 INFO L225 Difference]: With dead ends: 11634 [2021-12-18 19:49:40,677 INFO L226 Difference]: Without dead ends: 11480 [2021-12-18 19:49:40,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8354 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2816, Invalid=38190, Unknown=0, NotChecked=0, Total=41006 [2021-12-18 19:49:40,679 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1021 mSDsluCounter, 6386 mSDsCounter, 0 mSdLazyCounter, 4564 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 6502 SdHoareTripleChecker+Invalid, 5218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 586 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:40,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 6502 Invalid, 5218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 4564 Invalid, 0 Unknown, 586 Unchecked, 1.6s Time] [2021-12-18 19:49:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11480 states. [2021-12-18 19:49:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11480 to 5542. [2021-12-18 19:49:40,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5542 states, 5541 states have (on average 1.1203753835047825) internal successors, (6208), 5541 states have internal predecessors, (6208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5542 states to 5542 states and 6208 transitions. [2021-12-18 19:49:40,769 INFO L78 Accepts]: Start accepts. Automaton has 5542 states and 6208 transitions. Word has length 243 [2021-12-18 19:49:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:40,769 INFO L470 AbstractCegarLoop]: Abstraction has 5542 states and 6208 transitions. [2021-12-18 19:49:40,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 4.738255033557047) internal successors, (706), 149 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 5542 states and 6208 transitions. [2021-12-18 19:49:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-18 19:49:40,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:40,774 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:40,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-18 19:49:40,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:40,988 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:49:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1904830567, now seen corresponding path program 18 times [2021-12-18 19:49:40,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:40,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617286368] [2021-12-18 19:49:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:40,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2331 backedges. 89 proven. 2228 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:49:41,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:41,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617286368] [2021-12-18 19:49:41,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617286368] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:41,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070456527] [2021-12-18 19:49:41,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:49:41,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:41,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:41,951 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:49:41,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-18 19:49:44,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-18 19:49:44,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:44,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-18 19:49:44,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:44,375 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:49:44,376 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:49:45,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:52:34,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:52:34,950 INFO L388 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 18 treesize of output 18 [2021-12-18 19:52:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2331 backedges. 703 proven. 1614 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:52:35,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:52:39,370 INFO L388 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 13 treesize of output 11 [2021-12-18 19:52:39,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:52:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2331 backedges. 780 proven. 1537 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 19:52:42,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070456527] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:52:42,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:52:42,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2021-12-18 19:52:42,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616120296] [2021-12-18 19:52:42,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:52:42,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-12-18 19:52:42,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:52:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-12-18 19:52:42,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1790, Invalid=20850, Unknown=10, NotChecked=0, Total=22650 [2021-12-18 19:52:42,640 INFO L87 Difference]: Start difference. First operand 5542 states and 6208 transitions. Second operand has 151 states, 151 states have (on average 4.695364238410596) internal successors, (709), 151 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15