./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.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/openbsd_cstrspn-alloca-2.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 e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:59:36,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:59:36,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:59:36,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:59:36,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:59:36,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:59:36,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:59:36,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:59:36,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:59:36,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:59:36,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:59:36,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:59:36,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:59:36,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:59:36,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:59:36,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:59:36,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:59:36,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:59:36,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:59:36,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:59:36,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:59:36,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:59:36,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:59:36,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:59:36,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:59:36,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:59:36,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:59:36,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:59:36,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:59:36,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:59:36,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:59:36,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:59:36,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:59:36,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:59:36,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:59:36,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:59:36,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:59:36,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:59:36,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:59:36,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:59:36,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:59:36,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:59:36,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:59:36,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:59:36,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:59:36,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:59:36,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:59:36,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:59:36,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:59:36,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:59:36,175 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:59:36,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:59:36,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:59:36,176 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:59:36,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:59:36,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:59:36,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:59:36,177 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:59:36,177 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:59:36,177 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:59:36,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:59:36,177 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:59:36,177 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:59:36,177 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:59:36,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:59:36,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:59:36,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:59:36,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:59:36,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:59:36,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:59:36,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:59:36,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:59:36,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:59:36,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2021-12-18 19:59:36,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:59:36,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:59:36,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:59:36,411 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:59:36,411 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:59:36,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-12-18 19:59:36,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/059055172/f3c1d52c4b3449499dc80f6039d2130d/FLAG984941583 [2021-12-18 19:59:36,865 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:59:36,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-12-18 19:59:36,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/059055172/f3c1d52c4b3449499dc80f6039d2130d/FLAG984941583 [2021-12-18 19:59:37,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/059055172/f3c1d52c4b3449499dc80f6039d2130d [2021-12-18 19:59:37,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:59:37,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:59:37,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:59:37,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:59:37,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:59:37,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c584d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37, skipping insertion in model container [2021-12-18 19:59:37,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:59:37,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:59:37,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:59:37,578 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:59:37,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:59:37,633 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:59:37,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37 WrapperNode [2021-12-18 19:59:37,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:59:37,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:59:37,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:59:37,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:59:37,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,682 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-12-18 19:59:37,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:59:37,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:59:37,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:59:37,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:59:37,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:59:37,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:59:37,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:59:37,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:59:37,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (1/1) ... [2021-12-18 19:59:37,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:59:37,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:37,745 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 19:59:37,746 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 19:59:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:59:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:59:37,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:59:37,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:59:37,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:59:37,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:59:37,852 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:59:37,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:59:38,091 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:59:38,095 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:59:38,098 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-18 19:59:38,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:59:38 BoogieIcfgContainer [2021-12-18 19:59:38,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:59:38,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:59:38,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:59:38,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:59:38,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:59:37" (1/3) ... [2021-12-18 19:59:38,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e01592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:59:38, skipping insertion in model container [2021-12-18 19:59:38,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:59:37" (2/3) ... [2021-12-18 19:59:38,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e01592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:59:38, skipping insertion in model container [2021-12-18 19:59:38,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:59:38" (3/3) ... [2021-12-18 19:59:38,108 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2021-12-18 19:59:38,111 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:59:38,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-18 19:59:38,163 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:59:38,169 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 19:59:38,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-18 19:59:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:59:38,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:38,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:38,191 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:38,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-18 19:59:38,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:38,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790196094] [2021-12-18 19:59:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:38,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:38,360 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 19:59:38,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:38,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790196094] [2021-12-18 19:59:38,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790196094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:38,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:38,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:59:38,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592308106] [2021-12-18 19:59:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:38,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:59:38,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:38,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:59:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:59:38,385 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 19:59:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:38,417 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-12-18 19:59:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:59:38,418 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 19:59:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:38,423 INFO L225 Difference]: With dead ends: 78 [2021-12-18 19:59:38,423 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 19:59:38,424 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 19:59:38,426 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 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 19:59:38,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 19:59:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2021-12-18 19:59:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-18 19:59:38,447 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2021-12-18 19:59:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:38,447 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-18 19:59:38,448 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 19:59:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-18 19:59:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:59:38,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:38,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:38,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:59:38,449 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-18 19:59:38,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:38,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300573700] [2021-12-18 19:59:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:38,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:38,512 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 19:59:38,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:38,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300573700] [2021-12-18 19:59:38,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300573700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:38,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:38,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:59:38,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698118653] [2021-12-18 19:59:38,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:38,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:59:38,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:59:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:59:38,516 INFO L87 Difference]: Start difference. First operand 44 states and 50 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 19:59:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:38,543 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-12-18 19:59:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:59:38,544 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 19:59:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:38,545 INFO L225 Difference]: With dead ends: 42 [2021-12-18 19:59:38,545 INFO L226 Difference]: Without dead ends: 42 [2021-12-18 19:59:38,545 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 19:59:38,546 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:38,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-18 19:59:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-18 19:59:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-18 19:59:38,549 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-12-18 19:59:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:38,550 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-18 19:59:38,550 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 19:59:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-18 19:59:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:59:38,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:38,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:38,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:59:38,551 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:38,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-18 19:59:38,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568251089] [2021-12-18 19:59:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:38,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:38,599 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 19:59:38,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:38,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568251089] [2021-12-18 19:59:38,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568251089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:38,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:38,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:59:38,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403380452] [2021-12-18 19:59:38,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:38,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:59:38,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:38,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:59:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:59:38,602 INFO L87 Difference]: Start difference. First operand 42 states and 48 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 19:59:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:38,650 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-12-18 19:59:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:59:38,650 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 19:59:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:38,651 INFO L225 Difference]: With dead ends: 75 [2021-12-18 19:59:38,651 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 19:59:38,652 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 19:59:38,652 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:38,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 19:59:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2021-12-18 19:59:38,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:38,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-18 19:59:38,656 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2021-12-18 19:59:38,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:38,657 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-18 19:59:38,657 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 19:59:38,657 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-18 19:59:38,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:59:38,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:38,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:38,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:59:38,658 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:38,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:38,658 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-18 19:59:38,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:38,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669981668] [2021-12-18 19:59:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:38,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:38,694 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 19:59:38,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:38,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669981668] [2021-12-18 19:59:38,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669981668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:38,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:38,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:59:38,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805515347] [2021-12-18 19:59:38,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:59:38,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:38,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:59:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:59:38,697 INFO L87 Difference]: Start difference. First operand 44 states and 51 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 19:59:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:38,715 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-18 19:59:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:59:38,716 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 19:59:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:38,716 INFO L225 Difference]: With dead ends: 43 [2021-12-18 19:59:38,716 INFO L226 Difference]: Without dead ends: 43 [2021-12-18 19:59:38,717 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 19:59:38,718 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:38,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-18 19:59:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-18 19:59:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-18 19:59:38,721 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 9 [2021-12-18 19:59:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:38,721 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-18 19:59:38,721 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 19:59:38,722 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-18 19:59:38,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:59:38,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:38,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:38,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:59:38,722 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:38,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:38,723 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-18 19:59:38,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:38,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269545969] [2021-12-18 19:59:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:38,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:38,748 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 19:59:38,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:38,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269545969] [2021-12-18 19:59:38,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269545969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:38,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:38,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:59:38,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092692885] [2021-12-18 19:59:38,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:38,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:59:38,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:38,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:59:38,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:59:38,750 INFO L87 Difference]: Start difference. First operand 43 states and 50 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 19:59:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:38,773 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-18 19:59:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:59:38,773 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 19:59:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:38,774 INFO L225 Difference]: With dead ends: 76 [2021-12-18 19:59:38,774 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 19:59:38,775 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 19:59:38,807 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 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 19:59:38,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 19:59:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-12-18 19:59:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 53 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 19:59:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-12-18 19:59:38,811 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 9 [2021-12-18 19:59:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:38,812 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-12-18 19:59:38,812 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 19:59:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-12-18 19:59:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:59:38,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:38,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:38,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:59:38,813 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:38,813 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-18 19:59:38,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:38,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110608985] [2021-12-18 19:59:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:38,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:38,858 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 19:59:38,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:38,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110608985] [2021-12-18 19:59:38,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110608985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:38,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:38,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:59:38,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113870685] [2021-12-18 19:59:38,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:38,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:59:38,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:38,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:59:38,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:59:38,861 INFO L87 Difference]: Start difference. First operand 54 states and 64 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 19:59:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:38,876 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-12-18 19:59:38,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:59:38,876 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 19:59:38,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:38,877 INFO L225 Difference]: With dead ends: 52 [2021-12-18 19:59:38,877 INFO L226 Difference]: Without dead ends: 52 [2021-12-18 19:59:38,877 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 19:59:38,878 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:38,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:38,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-18 19:59:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-18 19:59:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 51 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 19:59:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-18 19:59:38,882 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 9 [2021-12-18 19:59:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:38,882 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-18 19:59:38,882 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 19:59:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-18 19:59:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:59:38,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:38,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:38,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:59:38,883 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:38,884 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-18 19:59:38,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:38,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495692200] [2021-12-18 19:59:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:38,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:38,928 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 19:59:38,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:38,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495692200] [2021-12-18 19:59:38,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495692200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:38,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:38,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:59:38,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069330496] [2021-12-18 19:59:38,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:38,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:59:38,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:38,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:59:38,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:59:38,930 INFO L87 Difference]: Start difference. First operand 52 states and 62 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 19:59:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:38,975 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-12-18 19:59:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:59:38,976 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 19:59:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:38,976 INFO L225 Difference]: With dead ends: 76 [2021-12-18 19:59:38,976 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 19:59:38,977 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 19:59:38,977 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:38,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 73 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 19:59:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-12-18 19:59:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) 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 19:59:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-12-18 19:59:38,981 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 9 [2021-12-18 19:59:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:38,982 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-12-18 19:59:38,982 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 19:59:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-12-18 19:59:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:59:38,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:38,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:38,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 19:59:38,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:38,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:38,983 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-18 19:59:38,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:38,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157120544] [2021-12-18 19:59:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:38,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:39,013 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 19:59:39,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:39,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157120544] [2021-12-18 19:59:39,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157120544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:39,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:39,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:59:39,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951054009] [2021-12-18 19:59:39,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:39,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:59:39,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:39,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:59:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:59:39,015 INFO L87 Difference]: Start difference. First operand 54 states and 65 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 19:59:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:39,031 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-12-18 19:59:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:59:39,032 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 19:59:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:39,032 INFO L225 Difference]: With dead ends: 53 [2021-12-18 19:59:39,032 INFO L226 Difference]: Without dead ends: 53 [2021-12-18 19:59:39,032 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 19:59:39,033 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:39,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 29 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-18 19:59:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-18 19:59:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.391304347826087) internal successors, (64), 52 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 19:59:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-12-18 19:59:39,036 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2021-12-18 19:59:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:39,036 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-12-18 19:59:39,037 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 19:59:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-12-18 19:59:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:59:39,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:39,037 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:39,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 19:59:39,038 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-18 19:59:39,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:39,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098166825] [2021-12-18 19:59:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:39,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:39,083 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 19:59:39,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:39,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098166825] [2021-12-18 19:59:39,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098166825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:39,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053725604] [2021-12-18 19:59:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:39,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:39,088 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 19:59:39,090 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 19:59:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:39,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:59:39,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:39,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:59:39,233 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 19:59:39,242 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 19:59:39,313 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 19:59:39,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:39,428 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 19:59:39,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053725604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:39,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:39,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-18 19:59:39,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295332203] [2021-12-18 19:59:39,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:39,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:59:39,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:39,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:59:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:59:39,430 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:39,530 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2021-12-18 19:59:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:59:39,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 19:59:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:39,531 INFO L225 Difference]: With dead ends: 116 [2021-12-18 19:59:39,531 INFO L226 Difference]: Without dead ends: 116 [2021-12-18 19:59:39,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:59:39,532 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 205 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:39,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 183 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:59:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-18 19:59:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 48. [2021-12-18 19:59:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-18 19:59:39,535 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2021-12-18 19:59:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:39,535 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-18 19:59:39,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-18 19:59:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:59:39,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:39,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:39,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 19:59:39,770 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 19:59:39,771 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2021-12-18 19:59:39,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:39,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759247441] [2021-12-18 19:59:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:39,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:39,815 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 19:59:39,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:39,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759247441] [2021-12-18 19:59:39,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759247441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:39,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:39,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:59:39,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858644003] [2021-12-18 19:59:39,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:39,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:59:39,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:39,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:59:39,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:59:39,817 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:39,849 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-12-18 19:59:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:59:39,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:59:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:39,850 INFO L225 Difference]: With dead ends: 47 [2021-12-18 19:59:39,850 INFO L226 Difference]: Without dead ends: 47 [2021-12-18 19:59:39,850 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 19:59:39,850 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:39,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-18 19:59:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-18 19:59:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-18 19:59:39,853 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2021-12-18 19:59:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:39,853 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-18 19:59:39,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-18 19:59:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:59:39,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:39,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:39,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 19:59:39,854 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:39,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:39,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2021-12-18 19:59:39,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:39,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821487686] [2021-12-18 19:59:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:39,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:39,900 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 19:59:39,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:39,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821487686] [2021-12-18 19:59:39,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821487686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:39,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:39,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:59:39,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056136485] [2021-12-18 19:59:39,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:39,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:59:39,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:39,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:59:39,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:59:39,903 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:39,954 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-18 19:59:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:59:39,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:59:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:39,955 INFO L225 Difference]: With dead ends: 50 [2021-12-18 19:59:39,955 INFO L226 Difference]: Without dead ends: 50 [2021-12-18 19:59:39,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:59:39,956 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:39,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-18 19:59:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-18 19:59:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-18 19:59:39,959 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2021-12-18 19:59:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:39,959 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-18 19:59:39,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-18 19:59:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:59:39,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:39,960 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:39,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 19:59:39,960 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-18 19:59:39,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:39,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724384118] [2021-12-18 19:59:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:39,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:40,017 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 19:59:40,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:40,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724384118] [2021-12-18 19:59:40,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724384118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109835971] [2021-12-18 19:59:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:40,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:40,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:40,024 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 19:59:40,025 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 19:59:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:40,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:59:40,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:40,080 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:59:40,081 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 19:59:40,141 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 19:59:40,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:40,267 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 19:59:40,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109835971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:40,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:40,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-18 19:59:40,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112997428] [2021-12-18 19:59:40,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:40,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:59:40,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:40,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:59:40,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:59:40,269 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:40,366 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-12-18 19:59:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:59:40,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:59:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:40,367 INFO L225 Difference]: With dead ends: 91 [2021-12-18 19:59:40,367 INFO L226 Difference]: Without dead ends: 91 [2021-12-18 19:59:40,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:59:40,368 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 178 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:40,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 170 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:59:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-18 19:59:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2021-12-18 19:59:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-18 19:59:40,370 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-12-18 19:59:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:40,371 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-18 19:59:40,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-18 19:59:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:59:40,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:40,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:40,390 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 19:59:40,587 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 19:59:40,587 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:40,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:40,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2021-12-18 19:59:40,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:40,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017584206] [2021-12-18 19:59:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:40,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:40,613 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 19:59:40,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:40,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017584206] [2021-12-18 19:59:40,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017584206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:40,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:40,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:59:40,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103523224] [2021-12-18 19:59:40,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:40,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:59:40,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:40,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:59:40,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:59:40,615 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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 19:59:40,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:40,655 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-18 19:59:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:59:40,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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 19:59:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:40,656 INFO L225 Difference]: With dead ends: 46 [2021-12-18 19:59:40,656 INFO L226 Difference]: Without dead ends: 46 [2021-12-18 19:59:40,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:59:40,657 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:40,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-18 19:59:40,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-18 19:59:40,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-18 19:59:40,659 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2021-12-18 19:59:40,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:40,659 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-18 19:59:40,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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 19:59:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-18 19:59:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:59:40,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:40,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:40,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 19:59:40,660 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:40,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:40,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2021-12-18 19:59:40,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:40,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113186617] [2021-12-18 19:59:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:40,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:40,715 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 19:59:40,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:40,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113186617] [2021-12-18 19:59:40,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113186617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:40,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:40,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 19:59:40,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338258447] [2021-12-18 19:59:40,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:40,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:59:40,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:40,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:59:40,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:59:40,717 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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 19:59:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:40,776 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-18 19:59:40,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:59:40,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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 19:59:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:40,777 INFO L225 Difference]: With dead ends: 49 [2021-12-18 19:59:40,777 INFO L226 Difference]: Without dead ends: 49 [2021-12-18 19:59:40,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:59:40,778 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:40,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 85 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-18 19:59:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-12-18 19:59:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 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 19:59:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-18 19:59:40,780 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2021-12-18 19:59:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:40,780 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-18 19:59:40,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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 19:59:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-18 19:59:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:59:40,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:40,781 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] [2021-12-18 19:59:40,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 19:59:40,781 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:40,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2021-12-18 19:59:40,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:40,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747319451] [2021-12-18 19:59:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:40,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:40,857 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 19:59:40,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:40,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747319451] [2021-12-18 19:59:40,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747319451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:40,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:40,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:59:40,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736172792] [2021-12-18 19:59:40,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:40,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:59:40,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:40,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:59:40,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:59:40,859 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:40,872 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-18 19:59:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:59:40,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 19:59:40,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:40,873 INFO L225 Difference]: With dead ends: 46 [2021-12-18 19:59:40,873 INFO L226 Difference]: Without dead ends: 43 [2021-12-18 19:59:40,873 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 19:59:40,874 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:40,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 52 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-18 19:59:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-18 19:59:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-18 19:59:40,876 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2021-12-18 19:59:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:40,876 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-18 19:59:40,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-18 19:59:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:59:40,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:40,877 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:40,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 19:59:40,877 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:40,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2021-12-18 19:59:40,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:40,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495525234] [2021-12-18 19:59:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:40,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:40,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:40,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495525234] [2021-12-18 19:59:40,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495525234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:40,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:40,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 19:59:40,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477543851] [2021-12-18 19:59:40,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:40,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:59:40,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:40,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:59:40,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:59:40,959 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:41,060 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-12-18 19:59:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:59:41,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 19:59:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:41,060 INFO L225 Difference]: With dead ends: 53 [2021-12-18 19:59:41,061 INFO L226 Difference]: Without dead ends: 34 [2021-12-18 19:59:41,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:59:41,061 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:41,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-18 19:59:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-18 19:59:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-18 19:59:41,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2021-12-18 19:59:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:41,062 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-18 19:59:41,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-18 19:59:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:59:41,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:41,063 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:41,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-18 19:59:41,063 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2021-12-18 19:59:41,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:41,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602771776] [2021-12-18 19:59:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:41,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:41,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:41,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602771776] [2021-12-18 19:59:41,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602771776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:41,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:41,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 19:59:41,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518701113] [2021-12-18 19:59:41,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:41,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 19:59:41,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 19:59:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:59:41,177 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:41,295 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-18 19:59:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:59:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 19:59:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:41,296 INFO L225 Difference]: With dead ends: 48 [2021-12-18 19:59:41,296 INFO L226 Difference]: Without dead ends: 38 [2021-12-18 19:59:41,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:59:41,296 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 93 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:41,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 147 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:41,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-18 19:59:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-18 19:59:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-18 19:59:41,298 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2021-12-18 19:59:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:41,298 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-18 19:59:41,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-18 19:59:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:59:41,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:41,299 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:41,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 19:59:41,299 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:41,299 INFO L85 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2021-12-18 19:59:41,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:41,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623944150] [2021-12-18 19:59:41,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:41,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:41,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:41,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623944150] [2021-12-18 19:59:41,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623944150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:41,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694982039] [2021-12-18 19:59:41,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:41,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:41,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:41,403 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 19:59:41,406 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 19:59:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:41,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 19:59:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:41,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:41,710 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 19:59:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:41,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694982039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:41,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:41,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2021-12-18 19:59:41,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204710353] [2021-12-18 19:59:41,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:41,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 19:59:41,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:41,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 19:59:41,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:59:41,736 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:42,038 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-12-18 19:59:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:59:42,039 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 19:59:42,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:42,039 INFO L225 Difference]: With dead ends: 49 [2021-12-18 19:59:42,039 INFO L226 Difference]: Without dead ends: 49 [2021-12-18 19:59:42,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:59:42,040 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:42,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 237 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:59:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-18 19:59:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-12-18 19:59:42,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:42,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-12-18 19:59:42,041 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2021-12-18 19:59:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:42,041 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-12-18 19:59:42,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-12-18 19:59:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:59:42,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:42,042 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:42,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-18 19:59:42,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 19:59:42,253 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:42,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2021-12-18 19:59:42,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:42,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089594801] [2021-12-18 19:59:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:42,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:42,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:42,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089594801] [2021-12-18 19:59:42,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089594801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:42,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:42,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 19:59:42,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596047910] [2021-12-18 19:59:42,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:42,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:59:42,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:42,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:59:42,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:59:42,339 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:42,426 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-12-18 19:59:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:59:42,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 19:59:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:42,427 INFO L225 Difference]: With dead ends: 65 [2021-12-18 19:59:42,428 INFO L226 Difference]: Without dead ends: 65 [2021-12-18 19:59:42,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:59:42,428 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:42,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 175 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-18 19:59:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-12-18 19:59:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 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 19:59:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-12-18 19:59:42,430 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2021-12-18 19:59:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:42,430 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-12-18 19:59:42,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-12-18 19:59:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:59:42,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:42,431 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:42,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-18 19:59:42,431 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:42,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2021-12-18 19:59:42,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:42,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133379211] [2021-12-18 19:59:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:42,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:42,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:42,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133379211] [2021-12-18 19:59:42,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133379211] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:59:42,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:59:42,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 19:59:42,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175077335] [2021-12-18 19:59:42,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:59:42,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:59:42,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:59:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:59:42,532 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:42,621 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-12-18 19:59:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:59:42,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 19:59:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:42,622 INFO L225 Difference]: With dead ends: 93 [2021-12-18 19:59:42,622 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 19:59:42,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:59:42,623 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:42,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 153 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:59:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 19:59:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2021-12-18 19:59:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-18 19:59:42,624 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2021-12-18 19:59:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:42,625 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-18 19:59:42,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-18 19:59:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:59:42,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:42,625 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:42,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-18 19:59:42,625 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:42,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2021-12-18 19:59:42,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:42,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503523841] [2021-12-18 19:59:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:42,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:42,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:42,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503523841] [2021-12-18 19:59:42,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503523841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:42,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422716832] [2021-12-18 19:59:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:42,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:42,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:42,723 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 19:59:42,724 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 19:59:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:42,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 19:59:42,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:42,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:59:42,810 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 19:59:42,813 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 19:59:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:42,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:43,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422716832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:43,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:43,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-12-18 19:59:43,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071537403] [2021-12-18 19:59:43,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:43,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 19:59:43,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 19:59:43,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:59:43,220 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:43,538 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-12-18 19:59:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:59:43,539 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-18 19:59:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:43,540 INFO L225 Difference]: With dead ends: 86 [2021-12-18 19:59:43,540 INFO L226 Difference]: Without dead ends: 86 [2021-12-18 19:59:43,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:59:43,540 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 178 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:43,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 340 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:59:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-18 19:59:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-12-18 19:59:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-12-18 19:59:43,542 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2021-12-18 19:59:43,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:43,542 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-12-18 19:59:43,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:43,542 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-12-18 19:59:43,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 19:59:43,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:43,543 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:43,562 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 19:59:43,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:43,755 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2021-12-18 19:59:43,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:43,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452249311] [2021-12-18 19:59:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:43,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:43,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:43,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452249311] [2021-12-18 19:59:43,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452249311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:43,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943073993] [2021-12-18 19:59:43,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:59:43,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:43,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:43,916 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 19:59:43,917 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 19:59:43,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:59:43,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 19:59:43,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:44,074 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 19:59:44,300 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-18 19:59:44,300 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 28 treesize of output 14 [2021-12-18 19:59:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:44,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:44,481 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 29 treesize of output 25 [2021-12-18 19:59:44,484 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-18 19:59:44,485 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 39 [2021-12-18 19:59:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:44,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943073993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:44,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:44,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 39 [2021-12-18 19:59:44,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208263181] [2021-12-18 19:59:44,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:44,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 19:59:44,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:44,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 19:59:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 19:59:44,672 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:45,149 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-12-18 19:59:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:59:45,151 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-18 19:59:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:45,151 INFO L225 Difference]: With dead ends: 127 [2021-12-18 19:59:45,151 INFO L226 Difference]: Without dead ends: 108 [2021-12-18 19:59:45,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=328, Invalid=2324, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 19:59:45,152 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:45,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 300 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 238 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-12-18 19:59:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-18 19:59:45,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2021-12-18 19:59:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 98 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-12-18 19:59:45,154 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 30 [2021-12-18 19:59:45,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:45,154 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-12-18 19:59:45,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:45,154 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-12-18 19:59:45,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 19:59:45,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:45,155 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:45,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-18 19:59:45,355 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,SelfDestructingSolverStorable21 [2021-12-18 19:59:45,355 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash -663599108, now seen corresponding path program 3 times [2021-12-18 19:59:45,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:45,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441906503] [2021-12-18 19:59:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:45,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:45,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:45,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441906503] [2021-12-18 19:59:45,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441906503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:45,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444340468] [2021-12-18 19:59:45,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:59:45,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:45,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:45,492 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 19:59:45,520 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 19:59:45,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 19:59:45,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:45,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-18 19:59:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:45,588 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:59:45,588 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 19:59:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:45,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:46,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444340468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:46,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:46,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2021-12-18 19:59:46,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790398240] [2021-12-18 19:59:46,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:46,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 19:59:46,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:46,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 19:59:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 19:59:46,132 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 33 states, 32 states have (on average 2.9375) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:46,460 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-12-18 19:59:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:59:46,462 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.9375) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-18 19:59:46,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:46,463 INFO L225 Difference]: With dead ends: 151 [2021-12-18 19:59:46,463 INFO L226 Difference]: Without dead ends: 151 [2021-12-18 19:59:46,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:59:46,464 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 391 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:46,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 255 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:59:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-18 19:59:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2021-12-18 19:59:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 130 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2021-12-18 19:59:46,468 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 34 [2021-12-18 19:59:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:46,468 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2021-12-18 19:59:46,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.9375) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2021-12-18 19:59:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-18 19:59:46,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:46,469 INFO L514 BasicCegarLoop]: trace histogram [3, 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 19:59:46,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:46,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:46,679 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2021-12-18 19:59:46,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:46,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045062619] [2021-12-18 19:59:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:46,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:46,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:46,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045062619] [2021-12-18 19:59:46,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045062619] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:46,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709833066] [2021-12-18 19:59:46,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:59:46,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:46,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:46,848 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 19:59:46,849 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 19:59:46,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:59:46,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:46,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-18 19:59:46,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:46,948 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 19:59:47,047 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 19:59:47,078 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 19:59:47,148 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 19:59:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:47,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:47,246 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_297 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_297) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2021-12-18 19:59:47,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:47,282 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 19:59:47,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:47,287 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 19:59:47,289 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 19:59:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:47,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709833066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:47,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:47,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-12-18 19:59:47,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975335861] [2021-12-18 19:59:47,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:47,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 19:59:47,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:47,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 19:59:47,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=569, Unknown=1, NotChecked=48, Total=702 [2021-12-18 19:59:47,493 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 19:59:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:47,902 INFO L93 Difference]: Finished difference Result 220 states and 244 transitions. [2021-12-18 19:59:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:59:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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) Word has length 37 [2021-12-18 19:59:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:47,904 INFO L225 Difference]: With dead ends: 220 [2021-12-18 19:59:47,904 INFO L226 Difference]: Without dead ends: 220 [2021-12-18 19:59:47,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=1358, Unknown=1, NotChecked=76, Total=1640 [2021-12-18 19:59:47,905 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 139 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:47,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 534 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 347 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2021-12-18 19:59:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-18 19:59:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 182. [2021-12-18 19:59:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.15) internal successors, (207), 181 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2021-12-18 19:59:47,909 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 37 [2021-12-18 19:59:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:47,909 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2021-12-18 19:59:47,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 19:59:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2021-12-18 19:59:47,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-18 19:59:47,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:47,910 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:47,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-18 19:59:48,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:48,142 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 4 times [2021-12-18 19:59:48,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:48,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077620618] [2021-12-18 19:59:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:48,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:48,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:48,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077620618] [2021-12-18 19:59:48,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077620618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:48,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033994082] [2021-12-18 19:59:48,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:59:48,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:48,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:48,335 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 19:59:48,370 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 19:59:48,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:59:48,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:48,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 19:59:48,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:48,423 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:59:48,423 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 19:59:48,537 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 19:59:48,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:59:48,861 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 19:59:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:48,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:49,185 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 19:59:49,188 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 19:59:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:49,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033994082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:49,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:49,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2021-12-18 19:59:49,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384200118] [2021-12-18 19:59:49,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:49,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 19:59:49,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:49,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 19:59:49,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:59:49,506 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:49,995 INFO L93 Difference]: Finished difference Result 271 states and 300 transitions. [2021-12-18 19:59:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 19:59:50,006 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-18 19:59:50,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:50,008 INFO L225 Difference]: With dead ends: 271 [2021-12-18 19:59:50,008 INFO L226 Difference]: Without dead ends: 243 [2021-12-18 19:59:50,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=354, Invalid=3068, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 19:59:50,009 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 135 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:50,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 556 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 261 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2021-12-18 19:59:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-18 19:59:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 226. [2021-12-18 19:59:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.1383928571428572) internal successors, (255), 225 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2021-12-18 19:59:50,014 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 39 [2021-12-18 19:59:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:50,014 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2021-12-18 19:59:50,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2021-12-18 19:59:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 19:59:50,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:50,023 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:50,042 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 19:59:50,239 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,SelfDestructingSolverStorable24 [2021-12-18 19:59:50,240 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1200593699, now seen corresponding path program 3 times [2021-12-18 19:59:50,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336349153] [2021-12-18 19:59:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:50,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:50,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:50,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336349153] [2021-12-18 19:59:50,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336349153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:50,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129385255] [2021-12-18 19:59:50,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:59:50,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:50,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:50,351 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 19:59:50,375 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 19:59:50,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 19:59:50,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-18 19:59:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:50,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:50,748 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 19:59:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:50,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129385255] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:50,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:50,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-18 19:59:50,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880210683] [2021-12-18 19:59:50,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:50,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 19:59:50,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:50,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 19:59:50,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:59:50,855 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand has 24 states, 23 states have (on average 4.304347826086956) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:51,172 INFO L93 Difference]: Finished difference Result 287 states and 320 transitions. [2021-12-18 19:59:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:59:51,172 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.304347826086956) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-18 19:59:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:51,181 INFO L225 Difference]: With dead ends: 287 [2021-12-18 19:59:51,181 INFO L226 Difference]: Without dead ends: 287 [2021-12-18 19:59:51,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:59:51,182 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 171 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:51,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 603 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:59:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-18 19:59:51,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 261. [2021-12-18 19:59:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 259 states have (on average 1.1467181467181466) internal successors, (297), 260 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:51,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 297 transitions. [2021-12-18 19:59:51,187 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 297 transitions. Word has length 41 [2021-12-18 19:59:51,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:51,187 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 297 transitions. [2021-12-18 19:59:51,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.304347826086956) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 297 transitions. [2021-12-18 19:59:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 19:59:51,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:51,187 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2021-12-18 19:59:51,208 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 19:59:51,399 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,SelfDestructingSolverStorable25 [2021-12-18 19:59:51,400 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:51,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:51,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1978925873, now seen corresponding path program 1 times [2021-12-18 19:59:51,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:51,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177655664] [2021-12-18 19:59:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:51,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 19:59:51,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:51,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177655664] [2021-12-18 19:59:51,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177655664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:51,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209703444] [2021-12-18 19:59:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:51,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:51,567 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 19:59:51,568 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 19:59:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:51,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 19:59:51,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:51,715 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 14 treesize of output 10 [2021-12-18 19:59:52,004 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-18 19:59:52,004 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 28 treesize of output 14 [2021-12-18 19:59:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 19:59:52,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:52,195 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 29 treesize of output 25 [2021-12-18 19:59:52,199 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-18 19:59:52,200 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 39 [2021-12-18 19:59:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 19:59:52,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209703444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:52,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:52,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 37 [2021-12-18 19:59:52,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960029649] [2021-12-18 19:59:52,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:52,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:59:52,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:59:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:59:52,294 INFO L87 Difference]: Start difference. First operand 261 states and 297 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:52,622 INFO L93 Difference]: Finished difference Result 270 states and 298 transitions. [2021-12-18 19:59:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:59:52,623 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-18 19:59:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:52,624 INFO L225 Difference]: With dead ends: 270 [2021-12-18 19:59:52,624 INFO L226 Difference]: Without dead ends: 239 [2021-12-18 19:59:52,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=352, Invalid=2404, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 19:59:52,625 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:52,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 283 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 179 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-12-18 19:59:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-18 19:59:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2021-12-18 19:59:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.1341991341991342) internal successors, (262), 232 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 262 transitions. [2021-12-18 19:59:52,635 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 262 transitions. Word has length 42 [2021-12-18 19:59:52,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:52,636 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 262 transitions. [2021-12-18 19:59:52,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:52,636 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 262 transitions. [2021-12-18 19:59:52,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-18 19:59:52,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:52,637 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:52,654 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 19:59:52,851 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,SelfDestructingSolverStorable26 [2021-12-18 19:59:52,852 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 5 times [2021-12-18 19:59:52,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:52,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060383692] [2021-12-18 19:59:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:52,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:53,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:53,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060383692] [2021-12-18 19:59:53,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060383692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:53,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140605091] [2021-12-18 19:59:53,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:59:53,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:53,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:53,032 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 19:59:53,060 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 19:59:53,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-18 19:59:53,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:53,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 19:59:53,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:53,144 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:59:53,145 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 19:59:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:53,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140605091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:53,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:53,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-12-18 19:59:53,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789463021] [2021-12-18 19:59:53,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:53,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 19:59:53,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:53,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 19:59:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:59:53,785 INFO L87 Difference]: Start difference. First operand 233 states and 262 transitions. Second operand has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:54,219 INFO L93 Difference]: Finished difference Result 369 states and 409 transitions. [2021-12-18 19:59:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:59:54,219 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-18 19:59:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:54,220 INFO L225 Difference]: With dead ends: 369 [2021-12-18 19:59:54,220 INFO L226 Difference]: Without dead ends: 369 [2021-12-18 19:59:54,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:59:54,221 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 381 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:54,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 422 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:59:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-18 19:59:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 303. [2021-12-18 19:59:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 301 states have (on average 1.1461794019933556) internal successors, (345), 302 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 345 transitions. [2021-12-18 19:59:54,225 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 345 transitions. Word has length 43 [2021-12-18 19:59:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:54,225 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 345 transitions. [2021-12-18 19:59:54,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 345 transitions. [2021-12-18 19:59:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 19:59:54,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:54,226 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:54,244 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 19:59:54,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 19:59:54,427 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:59:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:54,428 INFO L85 PathProgramCache]: Analyzing trace with hash -24196359, now seen corresponding path program 6 times [2021-12-18 19:59:54,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:54,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347321749] [2021-12-18 19:59:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:54,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:54,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:54,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347321749] [2021-12-18 19:59:54,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347321749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:54,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82565313] [2021-12-18 19:59:54,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:59:54,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:54,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:54,642 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 19:59:54,683 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 19:59:54,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 19:59:54,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:54,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 19:59:54,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:54,750 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:59:54,751 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 19:59:54,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 19:59:57,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:59:57,613 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 18 treesize of output 7 [2021-12-18 19:59:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 24 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:57,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:57,967 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 19:59:57,969 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 19:59:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:58,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82565313] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:58,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:58,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 45 [2021-12-18 19:59:58,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371527008] [2021-12-18 19:59:58,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:58,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 19:59:58,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:58,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 19:59:58,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1814, Unknown=1, NotChecked=0, Total=1980 [2021-12-18 19:59:58,353 INFO L87 Difference]: Start difference. First operand 303 states and 345 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 20:00:00,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:00,959 INFO L93 Difference]: Finished difference Result 415 states and 463 transitions. [2021-12-18 20:00:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 20:00:00,959 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 48 [2021-12-18 20:00:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:00,960 INFO L225 Difference]: With dead ends: 415 [2021-12-18 20:00:00,960 INFO L226 Difference]: Without dead ends: 382 [2021-12-18 20:00:00,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=440, Invalid=3981, Unknown=1, NotChecked=0, Total=4422 [2021-12-18 20:00:00,962 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 160 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:00,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 669 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 392 Invalid, 0 Unknown, 187 Unchecked, 0.1s Time] [2021-12-18 20:00:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-18 20:00:00,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 357. [2021-12-18 20:00:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 355 states have (on average 1.1408450704225352) internal successors, (405), 356 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 405 transitions. [2021-12-18 20:00:00,967 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 405 transitions. Word has length 48 [2021-12-18 20:00:00,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:00,967 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 405 transitions. [2021-12-18 20:00:00,967 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 20:00:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 405 transitions. [2021-12-18 20:00:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 20:00:00,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:00,968 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:00,987 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 20:00:01,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-18 20:00:01,183 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:01,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 4 times [2021-12-18 20:00:01,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:01,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74568856] [2021-12-18 20:00:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:01,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:01,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74568856] [2021-12-18 20:00:01,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74568856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650527720] [2021-12-18 20:00:01,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:00:01,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:01,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:01,758 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 20:00:01,767 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 20:00:01,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:00:01,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:01,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 20:00:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:01,861 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:00:01,861 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 20:00:01,874 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 20:00:02,089 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 20:00:02,128 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 20:00:02,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:00:02,493 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 20:00:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:02,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:03,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:03,083 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 20:00:03,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:03,088 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 20:00:03,091 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 20:00:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650527720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:03,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:03,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 53 [2021-12-18 20:00:03,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833642935] [2021-12-18 20:00:03,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:03,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-18 20:00:03,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:03,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-18 20:00:03,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2565, Unknown=27, NotChecked=0, Total=2756 [2021-12-18 20:00:03,537 INFO L87 Difference]: Start difference. First operand 357 states and 405 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 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 20:00:05,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:05,130 INFO L93 Difference]: Finished difference Result 589 states and 661 transitions. [2021-12-18 20:00:05,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 20:00:05,131 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 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 49 [2021-12-18 20:00:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:05,132 INFO L225 Difference]: With dead ends: 589 [2021-12-18 20:00:05,132 INFO L226 Difference]: Without dead ends: 562 [2021-12-18 20:00:05,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=623, Invalid=7360, Unknown=27, NotChecked=0, Total=8010 [2021-12-18 20:00:05,135 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 179 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 461 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:05,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 967 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 601 Invalid, 0 Unknown, 461 Unchecked, 0.3s Time] [2021-12-18 20:00:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-18 20:00:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 464. [2021-12-18 20:00:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 462 states have (on average 1.1428571428571428) internal successors, (528), 463 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 528 transitions. [2021-12-18 20:00:05,141 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 528 transitions. Word has length 49 [2021-12-18 20:00:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:05,141 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 528 transitions. [2021-12-18 20:00:05,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 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 20:00:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 528 transitions. [2021-12-18 20:00:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 20:00:05,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:05,142 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:05,159 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 20:00:05,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:05,355 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:05,356 INFO L85 PathProgramCache]: Analyzing trace with hash -839474363, now seen corresponding path program 2 times [2021-12-18 20:00:05,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:05,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923482270] [2021-12-18 20:00:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:05,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:00:05,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:05,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923482270] [2021-12-18 20:00:05,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923482270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:05,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794123385] [2021-12-18 20:00:05,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:00:05,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:05,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:05,782 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 20:00:05,783 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 20:00:05,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:00:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:05,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 20:00:05,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:05,947 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 20:00:06,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:06,609 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 20 treesize of output 20 [2021-12-18 20:00:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:00:06,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:07,319 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 20:00:07,323 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 20:00:07,325 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 35 treesize of output 27 [2021-12-18 20:00:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:00:07,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794123385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:07,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:07,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 46 [2021-12-18 20:00:07,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403174276] [2021-12-18 20:00:07,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:07,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 20:00:07,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:07,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 20:00:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1924, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 20:00:07,371 INFO L87 Difference]: Start difference. First operand 464 states and 528 transitions. Second operand has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:09,263 INFO L93 Difference]: Finished difference Result 569 states and 639 transitions. [2021-12-18 20:00:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 20:00:09,264 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-18 20:00:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:09,265 INFO L225 Difference]: With dead ends: 569 [2021-12-18 20:00:09,265 INFO L226 Difference]: Without dead ends: 534 [2021-12-18 20:00:09,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=509, Invalid=5811, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 20:00:09,266 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 217 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:09,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 720 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 545 Invalid, 0 Unknown, 390 Unchecked, 0.2s Time] [2021-12-18 20:00:09,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-18 20:00:09,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 363. [2021-12-18 20:00:09,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 361 states have (on average 1.1357340720221607) internal successors, (410), 362 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 410 transitions. [2021-12-18 20:00:09,272 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 410 transitions. Word has length 51 [2021-12-18 20:00:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:09,272 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 410 transitions. [2021-12-18 20:00:09,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:09,272 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 410 transitions. [2021-12-18 20:00:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 20:00:09,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:09,273 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:09,298 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 20:00:09,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:09,474 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:09,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:09,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2015974442, now seen corresponding path program 7 times [2021-12-18 20:00:09,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:09,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412877705] [2021-12-18 20:00:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:09,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:09,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:09,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412877705] [2021-12-18 20:00:09,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412877705] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:09,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176651246] [2021-12-18 20:00:09,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:00:09,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:09,660 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 20:00:09,661 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 20:00:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:09,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 20:00:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:09,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:10,216 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 20:00:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:10,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176651246] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:10,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:10,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2021-12-18 20:00:10,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887693510] [2021-12-18 20:00:10,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:10,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 20:00:10,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 20:00:10,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 20:00:10,272 INFO L87 Difference]: Start difference. First operand 363 states and 410 transitions. Second operand has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:10,802 INFO L93 Difference]: Finished difference Result 694 states and 777 transitions. [2021-12-18 20:00:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 20:00:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-18 20:00:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:10,804 INFO L225 Difference]: With dead ends: 694 [2021-12-18 20:00:10,804 INFO L226 Difference]: Without dead ends: 694 [2021-12-18 20:00:10,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 20:00:10,805 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 388 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:10,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 466 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:00:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-12-18 20:00:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 473. [2021-12-18 20:00:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 471 states have (on average 1.148619957537155) internal successors, (541), 472 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 541 transitions. [2021-12-18 20:00:10,811 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 541 transitions. Word has length 52 [2021-12-18 20:00:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:10,812 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 541 transitions. [2021-12-18 20:00:10,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 541 transitions. [2021-12-18 20:00:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 20:00:10,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:10,812 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:10,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-18 20:00:11,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:11,028 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1963378865, now seen corresponding path program 5 times [2021-12-18 20:00:11,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:11,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482668014] [2021-12-18 20:00:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:11,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:11,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:11,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482668014] [2021-12-18 20:00:11,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482668014] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:11,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179884640] [2021-12-18 20:00:11,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:00:11,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:11,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:11,160 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 20:00:11,161 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 20:00:11,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-18 20:00:11,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:11,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 20:00:11,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:11,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:11,648 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 20:00:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:11,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179884640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:11,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:11,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2021-12-18 20:00:11,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024443199] [2021-12-18 20:00:11,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:11,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 20:00:11,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 20:00:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-12-18 20:00:11,766 INFO L87 Difference]: Start difference. First operand 473 states and 541 transitions. Second operand has 29 states, 28 states have (on average 4.535714285714286) internal successors, (127), 29 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:12,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:12,164 INFO L93 Difference]: Finished difference Result 638 states and 719 transitions. [2021-12-18 20:00:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 20:00:12,164 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.535714285714286) internal successors, (127), 29 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-18 20:00:12,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:12,166 INFO L225 Difference]: With dead ends: 638 [2021-12-18 20:00:12,166 INFO L226 Difference]: Without dead ends: 638 [2021-12-18 20:00:12,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 20:00:12,167 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 325 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:12,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 754 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:00:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-18 20:00:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 536. [2021-12-18 20:00:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 534 states have (on average 1.151685393258427) internal successors, (615), 535 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 615 transitions. [2021-12-18 20:00:12,182 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 615 transitions. Word has length 53 [2021-12-18 20:00:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:12,183 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 615 transitions. [2021-12-18 20:00:12,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.535714285714286) internal successors, (127), 29 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 615 transitions. [2021-12-18 20:00:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 20:00:12,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:12,184 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:12,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-18 20:00:12,400 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,SelfDestructingSolverStorable32 [2021-12-18 20:00:12,400 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:12,401 INFO L85 PathProgramCache]: Analyzing trace with hash 678158875, now seen corresponding path program 8 times [2021-12-18 20:00:12,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:12,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077280806] [2021-12-18 20:00:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:12,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:12,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:12,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077280806] [2021-12-18 20:00:12,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077280806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:12,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502450519] [2021-12-18 20:00:12,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:00:12,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:12,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:12,632 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 20:00:12,669 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 20:00:12,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:00:12,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:12,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-18 20:00:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:12,839 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 20:00:13,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:13,637 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 20 treesize of output 20 [2021-12-18 20:00:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:13,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:14,526 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 20:00:14,530 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 20:00:14,532 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 35 treesize of output 27 [2021-12-18 20:00:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:14,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502450519] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:14,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:14,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 52 [2021-12-18 20:00:14,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370381884] [2021-12-18 20:00:14,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:14,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-18 20:00:14,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:14,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-18 20:00:14,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2463, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 20:00:14,587 INFO L87 Difference]: Start difference. First operand 536 states and 615 transitions. Second operand has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:18,141 INFO L93 Difference]: Finished difference Result 996 states and 1114 transitions. [2021-12-18 20:00:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 20:00:18,141 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-18 20:00:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:18,143 INFO L225 Difference]: With dead ends: 996 [2021-12-18 20:00:18,143 INFO L226 Difference]: Without dead ends: 954 [2021-12-18 20:00:18,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=470, Invalid=5692, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 20:00:18,144 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 417 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:18,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1530 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 969 Invalid, 0 Unknown, 427 Unchecked, 0.4s Time] [2021-12-18 20:00:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-12-18 20:00:18,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 656. [2021-12-18 20:00:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 654 states have (on average 1.146788990825688) internal successors, (750), 655 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 750 transitions. [2021-12-18 20:00:18,153 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 750 transitions. Word has length 57 [2021-12-18 20:00:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:18,153 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 750 transitions. [2021-12-18 20:00:18,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 750 transitions. [2021-12-18 20:00:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 20:00:18,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:18,154 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:18,185 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 20:00:18,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:18,383 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash 118455529, now seen corresponding path program 3 times [2021-12-18 20:00:18,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:18,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976343931] [2021-12-18 20:00:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:18,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:00:18,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:18,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976343931] [2021-12-18 20:00:18,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976343931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:18,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213264185] [2021-12-18 20:00:18,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:00:18,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:18,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:18,598 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 20:00:18,599 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 20:00:18,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 20:00:18,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 20:00:18,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:18,819 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 20:00:18,997 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 20:00:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:00:19,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:19,126 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 20:00:19,127 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 20:00:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:00:19,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213264185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:19,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:19,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2021-12-18 20:00:19,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119956910] [2021-12-18 20:00:19,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:19,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 20:00:19,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 20:00:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 20:00:19,245 INFO L87 Difference]: Start difference. First operand 656 states and 750 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:19,784 INFO L93 Difference]: Finished difference Result 850 states and 951 transitions. [2021-12-18 20:00:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 20:00:19,785 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 20:00:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:19,786 INFO L225 Difference]: With dead ends: 850 [2021-12-18 20:00:19,786 INFO L226 Difference]: Without dead ends: 740 [2021-12-18 20:00:19,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 20:00:19,787 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 227 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:19,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 736 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 631 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2021-12-18 20:00:19,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-12-18 20:00:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 690. [2021-12-18 20:00:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 688 states have (on average 1.1438953488372092) internal successors, (787), 689 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 787 transitions. [2021-12-18 20:00:19,794 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 787 transitions. Word has length 60 [2021-12-18 20:00:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:19,794 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 787 transitions. [2021-12-18 20:00:19,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 787 transitions. [2021-12-18 20:00:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 20:00:19,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:19,796 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 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 20:00:19,827 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 20:00:20,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:20,011 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:20,011 INFO L85 PathProgramCache]: Analyzing trace with hash -27203543, now seen corresponding path program 4 times [2021-12-18 20:00:20,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:20,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878873709] [2021-12-18 20:00:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:20,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 20:00:20,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:20,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878873709] [2021-12-18 20:00:20,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878873709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:20,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746164137] [2021-12-18 20:00:20,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:00:20,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:20,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:20,176 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 20:00:20,177 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 20:00:20,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:00:20,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 20:00:20,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:20,271 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:00:20,271 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 20:00:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 20:00:20,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 20:00:20,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746164137] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:20,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:20,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2021-12-18 20:00:20,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791819821] [2021-12-18 20:00:20,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:20,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 20:00:20,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:20,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 20:00:20,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-12-18 20:00:20,750 INFO L87 Difference]: Start difference. First operand 690 states and 787 transitions. Second operand has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:21,118 INFO L93 Difference]: Finished difference Result 719 states and 801 transitions. [2021-12-18 20:00:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 20:00:21,119 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have 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 20:00:21,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:21,120 INFO L225 Difference]: With dead ends: 719 [2021-12-18 20:00:21,120 INFO L226 Difference]: Without dead ends: 648 [2021-12-18 20:00:21,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=525, Invalid=1731, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 20:00:21,121 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 200 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:21,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 368 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:00:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-12-18 20:00:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 559. [2021-12-18 20:00:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 557 states have (on average 1.1346499102333931) internal successors, (632), 558 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 632 transitions. [2021-12-18 20:00:21,127 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 632 transitions. Word has length 60 [2021-12-18 20:00:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:21,127 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 632 transitions. [2021-12-18 20:00:21,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 632 transitions. [2021-12-18 20:00:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 20:00:21,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:21,128 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 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] [2021-12-18 20:00:21,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-18 20:00:21,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:21,344 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:21,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:21,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1052245572, now seen corresponding path program 6 times [2021-12-18 20:00:21,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:21,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443041800] [2021-12-18 20:00:21,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:21,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:21,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:21,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443041800] [2021-12-18 20:00:21,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443041800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:21,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212542757] [2021-12-18 20:00:21,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:00:21,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:21,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:21,720 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 20:00:21,721 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 20:00:21,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 20:00:21,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:21,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 20:00:21,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:21,829 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 20:00:22,034 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 20:00:22,073 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 20:00:22,242 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 20:00:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:22,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:22,459 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_733 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_733) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-18 20:00:22,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:22,464 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 20:00:22,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:22,468 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 20:00:22,470 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 11 treesize of output 7 [2021-12-18 20:00:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:22,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212542757] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:22,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:22,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 44 [2021-12-18 20:00:22,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003283803] [2021-12-18 20:00:22,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:22,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 20:00:22,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:22,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 20:00:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1686, Unknown=1, NotChecked=82, Total=1892 [2021-12-18 20:00:22,697 INFO L87 Difference]: Start difference. First operand 559 states and 632 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:23,838 INFO L93 Difference]: Finished difference Result 957 states and 1064 transitions. [2021-12-18 20:00:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 20:00:23,838 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-18 20:00:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:23,840 INFO L225 Difference]: With dead ends: 957 [2021-12-18 20:00:23,840 INFO L226 Difference]: Without dead ends: 837 [2021-12-18 20:00:23,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=273, Invalid=4152, Unknown=1, NotChecked=130, Total=4556 [2021-12-18 20:00:23,841 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 187 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 2190 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:23,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 2190 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1882 Invalid, 0 Unknown, 359 Unchecked, 0.7s Time] [2021-12-18 20:00:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-12-18 20:00:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 652. [2021-12-18 20:00:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 650 states have (on average 1.1353846153846154) internal successors, (738), 651 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 738 transitions. [2021-12-18 20:00:23,851 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 738 transitions. Word has length 61 [2021-12-18 20:00:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:23,863 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 738 transitions. [2021-12-18 20:00:23,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 738 transitions. [2021-12-18 20:00:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 20:00:23,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:23,864 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 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] [2021-12-18 20:00:23,883 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 20:00:24,078 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,SelfDestructingSolverStorable36 [2021-12-18 20:00:24,078 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash 241818559, now seen corresponding path program 7 times [2021-12-18 20:00:24,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:24,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400131434] [2021-12-18 20:00:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:24,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:24,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400131434] [2021-12-18 20:00:24,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400131434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:24,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217957896] [2021-12-18 20:00:24,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:00:24,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:24,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:24,276 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 20:00:24,277 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 20:00:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:24,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-18 20:00:24,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:00:24,383 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 20:00:24,385 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 20:00:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:24,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:25,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217957896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:25,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:25,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-12-18 20:00:25,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553179847] [2021-12-18 20:00:25,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:25,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 20:00:25,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:25,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 20:00:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:00:25,370 INFO L87 Difference]: Start difference. First operand 652 states and 738 transitions. Second operand has 39 states, 38 states have (on average 4.921052631578948) internal successors, (187), 39 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 20:00:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:26,215 INFO L93 Difference]: Finished difference Result 890 states and 997 transitions. [2021-12-18 20:00:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 20:00:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.921052631578948) internal successors, (187), 39 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 65 [2021-12-18 20:00:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:26,217 INFO L225 Difference]: With dead ends: 890 [2021-12-18 20:00:26,217 INFO L226 Difference]: Without dead ends: 890 [2021-12-18 20:00:26,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2021-12-18 20:00:26,218 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 487 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:26,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1117 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:00:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-12-18 20:00:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 708. [2021-12-18 20:00:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 706 states have (on average 1.1359773371104815) internal successors, (802), 707 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 802 transitions. [2021-12-18 20:00:26,236 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 802 transitions. Word has length 65 [2021-12-18 20:00:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:26,237 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 802 transitions. [2021-12-18 20:00:26,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.921052631578948) internal successors, (187), 39 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 20:00:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 802 transitions. [2021-12-18 20:00:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 20:00:26,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:26,238 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:26,260 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 20:00:26,461 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,SelfDestructingSolverStorable37 [2021-12-18 20:00:26,461 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:26,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:26,462 INFO L85 PathProgramCache]: Analyzing trace with hash 147941651, now seen corresponding path program 9 times [2021-12-18 20:00:26,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:26,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206323159] [2021-12-18 20:00:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:26,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:26,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:26,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206323159] [2021-12-18 20:00:26,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206323159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:26,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359583827] [2021-12-18 20:00:26,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:00:26,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:26,735 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 20:00:26,736 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 20:00:26,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-18 20:00:26,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:26,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-18 20:00:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:26,947 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 20:00:27,067 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 20:00:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:27,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:27,180 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 20:00:27,181 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 20:00:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:27,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359583827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:27,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:27,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 39 [2021-12-18 20:00:27,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652097840] [2021-12-18 20:00:27,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:27,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 20:00:27,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:27,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 20:00:27,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:00:27,263 INFO L87 Difference]: Start difference. First operand 708 states and 802 transitions. Second operand has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:28,112 INFO L93 Difference]: Finished difference Result 1307 states and 1464 transitions. [2021-12-18 20:00:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-18 20:00:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 20:00:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:28,115 INFO L225 Difference]: With dead ends: 1307 [2021-12-18 20:00:28,116 INFO L226 Difference]: Without dead ends: 1256 [2021-12-18 20:00:28,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=4095, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 20:00:28,117 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 286 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:28,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 2028 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1504 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2021-12-18 20:00:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-12-18 20:00:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 772. [2021-12-18 20:00:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 770 states have (on average 1.135064935064935) internal successors, (874), 771 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 874 transitions. [2021-12-18 20:00:28,127 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 874 transitions. Word has length 66 [2021-12-18 20:00:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:28,127 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 874 transitions. [2021-12-18 20:00:28,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:28,128 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 874 transitions. [2021-12-18 20:00:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-18 20:00:28,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:28,129 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:28,167 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 20:00:28,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 20:00:28,351 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1915377493, now seen corresponding path program 5 times [2021-12-18 20:00:28,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:28,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582076327] [2021-12-18 20:00:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:28,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 17 proven. 98 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:00:28,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:28,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582076327] [2021-12-18 20:00:28,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582076327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:28,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545961947] [2021-12-18 20:00:28,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:00:28,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:28,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:28,557 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 20:00:28,558 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 20:00:28,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-18 20:00:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 20:00:28,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:28,677 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:00:28,677 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 20:00:28,833 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 20:00:29,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:29,330 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 20:00:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:00:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:30,042 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 20:00:30,044 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 20:00:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:00:30,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545961947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:30,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:30,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 57 [2021-12-18 20:00:30,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088551966] [2021-12-18 20:00:30,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:30,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 20:00:30,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:30,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 20:00:30,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2953, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 20:00:30,472 INFO L87 Difference]: Start difference. First operand 772 states and 874 transitions. Second operand has 57 states, 57 states have (on average 3.3859649122807016) internal successors, (193), 57 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 20:00:32,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:32,198 INFO L93 Difference]: Finished difference Result 1359 states and 1520 transitions. [2021-12-18 20:00:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-18 20:00:32,198 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.3859649122807016) internal successors, (193), 57 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 69 [2021-12-18 20:00:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:32,200 INFO L225 Difference]: With dead ends: 1359 [2021-12-18 20:00:32,200 INFO L226 Difference]: Without dead ends: 1166 [2021-12-18 20:00:32,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=814, Invalid=8888, Unknown=0, NotChecked=0, Total=9702 [2021-12-18 20:00:32,201 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 349 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:32,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 1462 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1195 Invalid, 0 Unknown, 221 Unchecked, 0.4s Time] [2021-12-18 20:00:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-12-18 20:00:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 879. [2021-12-18 20:00:32,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 877 states have (on average 1.1379703534777652) internal successors, (998), 878 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 998 transitions. [2021-12-18 20:00:32,211 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 998 transitions. Word has length 69 [2021-12-18 20:00:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:32,211 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 998 transitions. [2021-12-18 20:00:32,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.3859649122807016) internal successors, (193), 57 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 20:00:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 998 transitions. [2021-12-18 20:00:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 20:00:32,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:32,212 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:32,229 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 20:00:32,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:32,428 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash 267889840, now seen corresponding path program 10 times [2021-12-18 20:00:32,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:32,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467113542] [2021-12-18 20:00:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:32,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:32,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467113542] [2021-12-18 20:00:32,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467113542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225146350] [2021-12-18 20:00:32,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:00:32,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:32,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:32,641 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 20:00:32,645 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 20:00:32,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:00:32,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-18 20:00:32,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:32,760 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:00:32,760 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 20:00:32,997 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 20:00:33,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:33,418 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 21 treesize of output 21 [2021-12-18 20:00:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:33,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:34,089 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 20:00:34,092 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 20:00:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 66 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:34,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225146350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:34,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:34,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 63 [2021-12-18 20:00:34,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778004272] [2021-12-18 20:00:34,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:34,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 20:00:34,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 20:00:34,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3663, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 20:00:34,798 INFO L87 Difference]: Start difference. First operand 879 states and 998 transitions. Second operand has 64 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 64 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:38,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:38,485 INFO L93 Difference]: Finished difference Result 1694 states and 1889 transitions. [2021-12-18 20:00:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-18 20:00:38,485 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 64 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have 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 20:00:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:38,488 INFO L225 Difference]: With dead ends: 1694 [2021-12-18 20:00:38,489 INFO L226 Difference]: Without dead ends: 1694 [2021-12-18 20:00:38,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2696, Invalid=11110, Unknown=0, NotChecked=0, Total=13806 [2021-12-18 20:00:38,490 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1327 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:38,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 1493 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 2049 Invalid, 0 Unknown, 143 Unchecked, 0.9s Time] [2021-12-18 20:00:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-12-18 20:00:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 969. [2021-12-18 20:00:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 967 states have (on average 1.141675284384695) internal successors, (1104), 968 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1104 transitions. [2021-12-18 20:00:38,503 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1104 transitions. Word has length 70 [2021-12-18 20:00:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:38,504 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1104 transitions. [2021-12-18 20:00:38,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 64 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1104 transitions. [2021-12-18 20:00:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 20:00:38,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:38,505 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 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] [2021-12-18 20:00:38,537 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 20:00:38,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:38,719 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:38,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2007377610, now seen corresponding path program 8 times [2021-12-18 20:00:38,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:38,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534197369] [2021-12-18 20:00:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:38,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:39,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534197369] [2021-12-18 20:00:39,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534197369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984241881] [2021-12-18 20:00:39,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:00:39,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:39,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:39,135 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 20:00:39,136 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 20:00:39,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:00:39,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:39,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-18 20:00:39,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:39,261 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 20:00:39,488 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 20:00:39,546 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 20:00:40,587 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:00:40,587 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 20:00:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:40,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:41,227 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (v_ArrVal_945 (Array Int Int))) (let ((.cse0 (select v_ArrVal_945 |ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= 0 .cse0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_945) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) .cse0))))) is different from false [2021-12-18 20:00:41,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:41,232 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 26 treesize of output 27 [2021-12-18 20:00:41,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:41,237 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 44 treesize of output 44 [2021-12-18 20:00:41,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:41,242 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 32 treesize of output 32 [2021-12-18 20:00:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:41,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984241881] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:41,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:41,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 64 [2021-12-18 20:00:41,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365913521] [2021-12-18 20:00:41,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:41,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 20:00:41,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 20:00:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=3659, Unknown=2, NotChecked=122, Total=4032 [2021-12-18 20:00:41,437 INFO L87 Difference]: Start difference. First operand 969 states and 1104 transitions. Second operand has 64 states, 64 states have (on average 2.5625) internal successors, (164), 64 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 20:00:42,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:42,547 INFO L93 Difference]: Finished difference Result 2100 states and 2382 transitions. [2021-12-18 20:00:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-18 20:00:42,548 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.5625) internal successors, (164), 64 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) Word has length 73 [2021-12-18 20:00:42,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:42,552 INFO L225 Difference]: With dead ends: 2100 [2021-12-18 20:00:42,552 INFO L226 Difference]: Without dead ends: 2057 [2021-12-18 20:00:42,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=536, Invalid=7838, Unknown=2, NotChecked=180, Total=8556 [2021-12-18 20:00:42,553 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 268 mSDsluCounter, 2936 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1537 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:42,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 3051 Invalid, 3292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1725 Invalid, 0 Unknown, 1537 Unchecked, 0.5s Time] [2021-12-18 20:00:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-12-18 20:00:42,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1770. [2021-12-18 20:00:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1768 states have (on average 1.1498868778280542) internal successors, (2033), 1769 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2033 transitions. [2021-12-18 20:00:42,609 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2033 transitions. Word has length 73 [2021-12-18 20:00:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:42,609 INFO L470 AbstractCegarLoop]: Abstraction has 1770 states and 2033 transitions. [2021-12-18 20:00:42,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.5625) internal successors, (164), 64 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 20:00:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2033 transitions. [2021-12-18 20:00:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 20:00:42,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:42,611 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 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] [2021-12-18 20:00:42,629 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 20:00:42,827 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,SelfDestructingSolverStorable41 [2021-12-18 20:00:42,827 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2052723789, now seen corresponding path program 9 times [2021-12-18 20:00:42,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:42,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628813302] [2021-12-18 20:00:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:42,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:43,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:43,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628813302] [2021-12-18 20:00:43,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628813302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:43,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790397789] [2021-12-18 20:00:43,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:00:43,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:43,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:43,027 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 20:00:43,027 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 20:00:43,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 20:00:43,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 20:00:43,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:43,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:43,694 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 7 treesize of output 5 [2021-12-18 20:00:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:43,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790397789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:43,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:43,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2021-12-18 20:00:43,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527801028] [2021-12-18 20:00:43,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:43,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 20:00:43,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 20:00:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 20:00:43,746 INFO L87 Difference]: Start difference. First operand 1770 states and 2033 transitions. Second operand has 41 states, 40 states have (on average 4.875) internal successors, (195), 41 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:44,517 INFO L93 Difference]: Finished difference Result 2460 states and 2809 transitions. [2021-12-18 20:00:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 20:00:44,517 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.875) internal successors, (195), 41 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-18 20:00:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:44,522 INFO L225 Difference]: With dead ends: 2460 [2021-12-18 20:00:44,522 INFO L226 Difference]: Without dead ends: 2460 [2021-12-18 20:00:44,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=678, Invalid=2982, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 20:00:44,534 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 350 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:44,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1455 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:00:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-12-18 20:00:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1864. [2021-12-18 20:00:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1862 states have (on average 1.1498388829215898) internal successors, (2141), 1863 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2141 transitions. [2021-12-18 20:00:44,553 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2141 transitions. Word has length 77 [2021-12-18 20:00:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:44,555 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 2141 transitions. [2021-12-18 20:00:44,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.875) internal successors, (195), 41 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2141 transitions. [2021-12-18 20:00:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-18 20:00:44,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:44,557 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:44,575 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 20:00:44,773 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,SelfDestructingSolverStorable42 [2021-12-18 20:00:44,773 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1777858736, now seen corresponding path program 11 times [2021-12-18 20:00:44,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:44,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728467162] [2021-12-18 20:00:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:44,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 136 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:45,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:45,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728467162] [2021-12-18 20:00:45,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728467162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:45,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569871070] [2021-12-18 20:00:45,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:00:45,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:45,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:45,035 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 20:00:45,037 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 20:00:45,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-18 20:00:45,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:45,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 20:00:45,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:45,163 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:00:45,163 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 20:00:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 149 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:45,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 149 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:45,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569871070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:45,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 53 [2021-12-18 20:00:45,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762517306] [2021-12-18 20:00:45,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:45,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-18 20:00:45,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-18 20:00:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2328, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 20:00:45,932 INFO L87 Difference]: Start difference. First operand 1864 states and 2141 transitions. Second operand has 53 states, 53 states have (on average 3.5283018867924527) internal successors, (187), 53 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 20:00:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:47,273 INFO L93 Difference]: Finished difference Result 4347 states and 4886 transitions. [2021-12-18 20:00:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-18 20:00:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.5283018867924527) internal successors, (187), 53 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 80 [2021-12-18 20:00:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:47,293 INFO L225 Difference]: With dead ends: 4347 [2021-12-18 20:00:47,293 INFO L226 Difference]: Without dead ends: 3803 [2021-12-18 20:00:47,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2537, Invalid=8383, Unknown=0, NotChecked=0, Total=10920 [2021-12-18 20:00:47,294 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 533 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:47,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 1207 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:00:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3803 states. [2021-12-18 20:00:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3803 to 2288. [2021-12-18 20:00:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2286 states have (on average 1.1504811898512686) internal successors, (2630), 2287 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 2630 transitions. [2021-12-18 20:00:47,357 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 2630 transitions. Word has length 80 [2021-12-18 20:00:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:47,357 INFO L470 AbstractCegarLoop]: Abstraction has 2288 states and 2630 transitions. [2021-12-18 20:00:47,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.5283018867924527) internal successors, (187), 53 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 20:00:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 2630 transitions. [2021-12-18 20:00:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-18 20:00:47,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:47,359 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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 20:00:47,382 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 20:00:47,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:47,577 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2122268416, now seen corresponding path program 1 times [2021-12-18 20:00:47,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:47,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964137549] [2021-12-18 20:00:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:47,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:00:47,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:47,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964137549] [2021-12-18 20:00:47,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964137549] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:47,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261300870] [2021-12-18 20:00:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:47,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:47,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:47,915 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 20:00:47,951 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 20:00:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:48,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 20:00:48,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:48,066 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 20:00:48,327 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 20:00:48,362 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 20:00:48,501 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 20:00:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 11 proven. 128 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:00:48,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:48,685 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1078 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1078) |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 20:00:48,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:48,689 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 20:00:48,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:48,694 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 20:00:48,702 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 20:00:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:00:48,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261300870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:48,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:48,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2021-12-18 20:00:48,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950121343] [2021-12-18 20:00:48,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:48,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 20:00:48,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:48,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 20:00:48,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1089, Unknown=1, NotChecked=66, Total=1260 [2021-12-18 20:00:48,933 INFO L87 Difference]: Start difference. First operand 2288 states and 2630 transitions. Second operand has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:49,695 INFO L93 Difference]: Finished difference Result 2770 states and 3123 transitions. [2021-12-18 20:00:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 20:00:49,696 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-18 20:00:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:49,700 INFO L225 Difference]: With dead ends: 2770 [2021-12-18 20:00:49,700 INFO L226 Difference]: Without dead ends: 1954 [2021-12-18 20:00:49,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=397, Invalid=3028, Unknown=1, NotChecked=114, Total=3540 [2021-12-18 20:00:49,703 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 477 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:49,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 2020 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1212 Invalid, 0 Unknown, 266 Unchecked, 0.3s Time] [2021-12-18 20:00:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-12-18 20:00:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1280. [2021-12-18 20:00:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1278 states have (on average 1.1416275430359937) internal successors, (1459), 1279 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1459 transitions. [2021-12-18 20:00:49,760 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1459 transitions. Word has length 82 [2021-12-18 20:00:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:49,761 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1459 transitions. [2021-12-18 20:00:49,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1459 transitions. [2021-12-18 20:00:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-18 20:00:49,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:49,763 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:49,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:49,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:49,963 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1425198035, now seen corresponding path program 12 times [2021-12-18 20:00:49,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:49,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14091034] [2021-12-18 20:00:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:49,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:50,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14091034] [2021-12-18 20:00:50,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14091034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362876465] [2021-12-18 20:00:50,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:00:50,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:50,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:50,303 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 20:00:50,315 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 20:00:50,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-18 20:00:50,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:50,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-18 20:00:50,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:50,679 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 20:00:50,877 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 20:00:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:50,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:51,040 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 13 [2021-12-18 20:00:51,041 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 20:00:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:51,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362876465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:51,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:51,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 45 [2021-12-18 20:00:51,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184457524] [2021-12-18 20:00:51,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:51,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 20:00:51,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:51,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 20:00:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 20:00:51,186 INFO L87 Difference]: Start difference. First operand 1280 states and 1459 transitions. Second operand has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:52,500 INFO L93 Difference]: Finished difference Result 2322 states and 2607 transitions. [2021-12-18 20:00:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 20:00:52,500 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-18 20:00:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:52,504 INFO L225 Difference]: With dead ends: 2322 [2021-12-18 20:00:52,504 INFO L226 Difference]: Without dead ends: 1989 [2021-12-18 20:00:52,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 20:00:52,505 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 493 mSDsluCounter, 2884 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:52,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 3013 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2436 Invalid, 0 Unknown, 72 Unchecked, 0.8s Time] [2021-12-18 20:00:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2021-12-18 20:00:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1304. [2021-12-18 20:00:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1302 states have (on average 1.1397849462365592) internal successors, (1484), 1303 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:52,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1484 transitions. [2021-12-18 20:00:52,521 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1484 transitions. Word has length 84 [2021-12-18 20:00:52,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:52,521 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 1484 transitions. [2021-12-18 20:00:52,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1484 transitions. [2021-12-18 20:00:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-18 20:00:52,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:52,523 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 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] [2021-12-18 20:00:52,539 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 20:00:52,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:52,740 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:00:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:52,741 INFO L85 PathProgramCache]: Analyzing trace with hash 701755736, now seen corresponding path program 10 times [2021-12-18 20:00:52,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:52,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685259658] [2021-12-18 20:00:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:52,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:00:53,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:53,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685259658] [2021-12-18 20:00:53,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685259658] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:53,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229573580] [2021-12-18 20:00:53,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:00:53,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:53,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:53,086 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 20:00:53,087 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 20:00:53,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:00:53,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:53,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-18 20:00:53,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:53,227 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:00:53,228 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 20:00:53,238 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 10 treesize of output 8 [2021-12-18 20:00:53,661 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 20:00:53,711 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 20:01:00,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:01:00,964 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 18 treesize of output 7 [2021-12-18 20:01:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 81 proven. 80 refuted. 16 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:01,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:01,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:01,826 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 20:01:01,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:01,832 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 20:01:01,835 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 9 treesize of output 7 [2021-12-18 20:01:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 97 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:02,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229573580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:02,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:02,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 21] total 64 [2021-12-18 20:01:02,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660247725] [2021-12-18 20:01:02,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:02,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 20:01:02,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 20:01:02,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=3777, Unknown=3, NotChecked=0, Total=4032 [2021-12-18 20:01:02,691 INFO L87 Difference]: Start difference. First operand 1304 states and 1484 transitions. Second operand has 64 states, 64 states have (on average 3.71875) internal successors, (238), 64 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 20:01:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:30,350 INFO L93 Difference]: Finished difference Result 3018 states and 3422 transitions. [2021-12-18 20:01:30,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-18 20:01:30,351 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.71875) internal successors, (238), 64 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 85 [2021-12-18 20:01:30,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:30,359 INFO L225 Difference]: With dead ends: 3018 [2021-12-18 20:01:30,361 INFO L226 Difference]: Without dead ends: 2214 [2021-12-18 20:01:30,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 140 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2589 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=986, Invalid=11665, Unknown=5, NotChecked=0, Total=12656 [2021-12-18 20:01:30,363 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 334 mSDsluCounter, 2360 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 2432 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:30,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 2432 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1110 Invalid, 0 Unknown, 574 Unchecked, 0.4s Time] [2021-12-18 20:01:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-12-18 20:01:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1390. [2021-12-18 20:01:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1388 states have (on average 1.1390489913544668) internal successors, (1581), 1389 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1581 transitions. [2021-12-18 20:01:30,376 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1581 transitions. Word has length 85 [2021-12-18 20:01:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:30,376 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 1581 transitions. [2021-12-18 20:01:30,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.71875) internal successors, (238), 64 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 20:01:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1581 transitions. [2021-12-18 20:01:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-18 20:01:30,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:30,378 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:30,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-18 20:01:30,584 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,SelfDestructingSolverStorable46 [2021-12-18 20:01:30,584 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:30,585 INFO L85 PathProgramCache]: Analyzing trace with hash 767994506, now seen corresponding path program 13 times [2021-12-18 20:01:30,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:30,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429161693] [2021-12-18 20:01:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:30,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:30,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429161693] [2021-12-18 20:01:30,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429161693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661720585] [2021-12-18 20:01:30,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:01:30,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:30,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:30,921 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 20:01:30,921 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 20:01:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-18 20:01:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:31,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:32,042 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 20:01:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:32,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661720585] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:32,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:32,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 49 [2021-12-18 20:01:32,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012834468] [2021-12-18 20:01:32,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:32,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 20:01:32,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 20:01:32,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2234, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 20:01:32,120 INFO L87 Difference]: Start difference. First operand 1390 states and 1581 transitions. Second operand has 50 states, 49 states have (on average 3.6530612244897958) internal successors, (179), 50 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:34,129 INFO L93 Difference]: Finished difference Result 2297 states and 2576 transitions. [2021-12-18 20:01:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 20:01:34,129 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.6530612244897958) internal successors, (179), 50 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-18 20:01:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:34,133 INFO L225 Difference]: With dead ends: 2297 [2021-12-18 20:01:34,133 INFO L226 Difference]: Without dead ends: 2297 [2021-12-18 20:01:34,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1371, Invalid=5769, Unknown=0, NotChecked=0, Total=7140 [2021-12-18 20:01:34,133 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 824 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:34,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 1604 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 20:01:34,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-12-18 20:01:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1450. [2021-12-18 20:01:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1448 states have (on average 1.1408839779005524) internal successors, (1652), 1449 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 1652 transitions. [2021-12-18 20:01:34,146 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 1652 transitions. Word has length 88 [2021-12-18 20:01:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:34,146 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 1652 transitions. [2021-12-18 20:01:34,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.6530612244897958) internal successors, (179), 50 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 1652 transitions. [2021-12-18 20:01:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-18 20:01:34,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:34,148 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 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] [2021-12-18 20:01:34,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-18 20:01:34,364 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,SelfDestructingSolverStorable47 [2021-12-18 20:01:34,365 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:34,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:34,365 INFO L85 PathProgramCache]: Analyzing trace with hash 303608411, now seen corresponding path program 11 times [2021-12-18 20:01:34,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:34,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495453720] [2021-12-18 20:01:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:34,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:34,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:34,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495453720] [2021-12-18 20:01:34,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495453720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:34,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883784598] [2021-12-18 20:01:34,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:01:34,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:34,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:34,612 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 20:01:34,613 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 20:01:34,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 20:01:34,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:34,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 20:01:34,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:34,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:01:34,768 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 20:01:34,770 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 20:01:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:35,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 66 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:36,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883784598] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:36,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:36,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 46 [2021-12-18 20:01:36,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660281032] [2021-12-18 20:01:36,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:36,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 20:01:36,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:36,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 20:01:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 20:01:36,034 INFO L87 Difference]: Start difference. First operand 1450 states and 1652 transitions. Second operand has 47 states, 46 states have (on average 5.586956521739131) internal successors, (257), 47 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:37,212 INFO L93 Difference]: Finished difference Result 2354 states and 2670 transitions. [2021-12-18 20:01:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 20:01:37,212 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 5.586956521739131) internal successors, (257), 47 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have 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 20:01:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:37,215 INFO L225 Difference]: With dead ends: 2354 [2021-12-18 20:01:37,215 INFO L226 Difference]: Without dead ends: 2354 [2021-12-18 20:01:37,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1014, Invalid=4536, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 20:01:37,216 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 494 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:37,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 1519 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:01:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-12-18 20:01:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 1587. [2021-12-18 20:01:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1585 states have (on average 1.1419558359621451) internal successors, (1810), 1586 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 1810 transitions. [2021-12-18 20:01:37,228 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 1810 transitions. Word has length 89 [2021-12-18 20:01:37,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:37,229 INFO L470 AbstractCegarLoop]: Abstraction has 1587 states and 1810 transitions. [2021-12-18 20:01:37,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 5.586956521739131) internal successors, (257), 47 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 1810 transitions. [2021-12-18 20:01:37,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-18 20:01:37,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:37,230 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:37,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-18 20:01:37,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-18 20:01:37,440 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2114784281, now seen corresponding path program 14 times [2021-12-18 20:01:37,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:37,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005647193] [2021-12-18 20:01:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:37,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 26 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:37,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:37,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005647193] [2021-12-18 20:01:37,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005647193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:37,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438177480] [2021-12-18 20:01:37,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:01:37,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:37,846 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 20:01:37,847 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 20:01:37,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:01:37,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:37,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-18 20:01:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:38,246 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 20:01:38,471 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 20:01:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 26 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:38,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:38,653 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 20:01:38,655 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 20:01:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 26 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:38,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438177480] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:38,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:38,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 48 [2021-12-18 20:01:38,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260564170] [2021-12-18 20:01:38,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:38,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 20:01:38,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:38,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 20:01:38,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 20:01:38,826 INFO L87 Difference]: Start difference. First operand 1587 states and 1810 transitions. Second operand has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 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 20:01:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:40,456 INFO L93 Difference]: Finished difference Result 3331 states and 3793 transitions. [2021-12-18 20:01:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 20:01:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 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 93 [2021-12-18 20:01:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:40,465 INFO L225 Difference]: With dead ends: 3331 [2021-12-18 20:01:40,465 INFO L226 Difference]: Without dead ends: 3257 [2021-12-18 20:01:40,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=427, Invalid=4829, Unknown=0, NotChecked=0, Total=5256 [2021-12-18 20:01:40,466 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 383 mSDsluCounter, 3405 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 3554 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:40,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 3554 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2709 Invalid, 0 Unknown, 189 Unchecked, 1.0s Time] [2021-12-18 20:01:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-12-18 20:01:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 1891. [2021-12-18 20:01:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1889 states have (on average 1.1445209105346745) internal successors, (2162), 1890 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 2162 transitions. [2021-12-18 20:01:40,486 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 2162 transitions. Word has length 93 [2021-12-18 20:01:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:40,486 INFO L470 AbstractCegarLoop]: Abstraction has 1891 states and 2162 transitions. [2021-12-18 20:01:40,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 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 20:01:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 2162 transitions. [2021-12-18 20:01:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-18 20:01:40,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:40,488 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:40,508 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 20:01:40,705 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,SelfDestructingSolverStorable49 [2021-12-18 20:01:40,706 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:40,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1741924822, now seen corresponding path program 15 times [2021-12-18 20:01:40,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:40,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399779516] [2021-12-18 20:01:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:40,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 91 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:41,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399779516] [2021-12-18 20:01:41,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399779516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570691678] [2021-12-18 20:01:41,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:01:41,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:41,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:41,104 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 20:01:41,105 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 20:01:41,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-18 20:01:41,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:41,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 20:01:41,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:41,282 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:01:41,282 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 20:01:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:42,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 153 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:43,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570691678] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:43,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:43,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 74 [2021-12-18 20:01:43,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102709899] [2021-12-18 20:01:43,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:43,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-18 20:01:43,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-18 20:01:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=4861, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 20:01:43,405 INFO L87 Difference]: Start difference. First operand 1891 states and 2162 transitions. Second operand has 75 states, 74 states have (on average 3.824324324324324) internal successors, (283), 75 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:45,351 INFO L93 Difference]: Finished difference Result 3513 states and 3987 transitions. [2021-12-18 20:01:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 20:01:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.824324324324324) internal successors, (283), 75 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-18 20:01:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:45,356 INFO L225 Difference]: With dead ends: 3513 [2021-12-18 20:01:45,356 INFO L226 Difference]: Without dead ends: 3513 [2021-12-18 20:01:45,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2591, Invalid=10065, Unknown=0, NotChecked=0, Total=12656 [2021-12-18 20:01:45,357 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 875 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:45,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 1184 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 20:01:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-12-18 20:01:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 2461. [2021-12-18 20:01:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2461 states, 2459 states have (on average 1.156974379829199) internal successors, (2845), 2460 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 2845 transitions. [2021-12-18 20:01:45,377 INFO L78 Accepts]: Start accepts. Automaton has 2461 states and 2845 transitions. Word has length 97 [2021-12-18 20:01:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:45,378 INFO L470 AbstractCegarLoop]: Abstraction has 2461 states and 2845 transitions. [2021-12-18 20:01:45,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.824324324324324) internal successors, (283), 75 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2461 states and 2845 transitions. [2021-12-18 20:01:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-18 20:01:45,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:45,379 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 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] [2021-12-18 20:01:45,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-18 20:01:45,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:45,597 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:45,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2077401446, now seen corresponding path program 12 times [2021-12-18 20:01:45,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:45,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158922620] [2021-12-18 20:01:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:45,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:46,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158922620] [2021-12-18 20:01:46,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158922620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489759397] [2021-12-18 20:01:46,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:01:46,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:46,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:46,018 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 20:01:46,019 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 20:01:46,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 20:01:46,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:46,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 163 conjunts are in the unsatisfiable core [2021-12-18 20:01:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:46,177 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 20:01:46,528 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 20:01:46,574 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 20:01:47,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:01:47,957 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-12-18 20:01:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:48,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:48,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1433 (Array Int Int))) (let ((.cse0 (select v_ArrVal_1433 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= 0 .cse0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1433) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) .cse0))))) is different from false [2021-12-18 20:01:48,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:48,736 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 26 treesize of output 27 [2021-12-18 20:01:48,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:48,740 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 44 treesize of output 44 [2021-12-18 20:01:48,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:48,745 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 32 treesize of output 32 [2021-12-18 20:01:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:49,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489759397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:49,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:49,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 31] total 83 [2021-12-18 20:01:49,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177902712] [2021-12-18 20:01:49,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:49,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-18 20:01:49,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-18 20:01:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=6369, Unknown=1, NotChecked=160, Total=6806 [2021-12-18 20:01:49,214 INFO L87 Difference]: Start difference. First operand 2461 states and 2845 transitions. Second operand has 83 states, 83 states have (on average 3.0602409638554215) internal successors, (254), 83 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:50,243 INFO L93 Difference]: Finished difference Result 4662 states and 5374 transitions. [2021-12-18 20:01:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-18 20:01:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.0602409638554215) internal successors, (254), 83 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-18 20:01:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:50,249 INFO L225 Difference]: With dead ends: 4662 [2021-12-18 20:01:50,249 INFO L226 Difference]: Without dead ends: 4603 [2021-12-18 20:01:50,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=421, Invalid=9884, Unknown=1, NotChecked=200, Total=10506 [2021-12-18 20:01:50,252 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 200 mSDsluCounter, 3405 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 2228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 690 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:50,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 3476 Invalid, 2228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1524 Invalid, 0 Unknown, 690 Unchecked, 0.4s Time] [2021-12-18 20:01:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4603 states. [2021-12-18 20:01:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4603 to 3667. [2021-12-18 20:01:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3667 states, 3665 states have (on average 1.1593451568894952) internal successors, (4249), 3666 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 4249 transitions. [2021-12-18 20:01:50,284 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 4249 transitions. Word has length 97 [2021-12-18 20:01:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:50,284 INFO L470 AbstractCegarLoop]: Abstraction has 3667 states and 4249 transitions. [2021-12-18 20:01:50,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.0602409638554215) internal successors, (254), 83 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 4249 transitions. [2021-12-18 20:01:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 20:01:50,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:50,286 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 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] [2021-12-18 20:01:50,305 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 20:01:50,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:50,505 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1316555287, now seen corresponding path program 13 times [2021-12-18 20:01:50,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:50,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943336744] [2021-12-18 20:01:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:50,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:50,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:50,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943336744] [2021-12-18 20:01:50,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943336744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447088967] [2021-12-18 20:01:50,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:01:50,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:50,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:50,809 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 20:01:50,810 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 20:01:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:50,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 20:01:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:51,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:51,591 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 20:01:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:51,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447088967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:51,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:51,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 42 [2021-12-18 20:01:51,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612200153] [2021-12-18 20:01:51,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:51,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 20:01:51,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 20:01:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 20:01:51,636 INFO L87 Difference]: Start difference. First operand 3667 states and 4249 transitions. Second operand has 43 states, 42 states have (on average 4.833333333333333) internal successors, (203), 43 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:52,491 INFO L93 Difference]: Finished difference Result 5201 states and 6012 transitions. [2021-12-18 20:01:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 20:01:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.833333333333333) internal successors, (203), 43 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 20:01:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:52,498 INFO L225 Difference]: With dead ends: 5201 [2021-12-18 20:01:52,498 INFO L226 Difference]: Without dead ends: 5201 [2021-12-18 20:01:52,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=866, Invalid=3826, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 20:01:52,499 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 431 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1977 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:52,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 1977 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:01:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-12-18 20:01:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 3859. [2021-12-18 20:01:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3859 states, 3857 states have (on average 1.159709618874773) internal successors, (4473), 3858 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3859 states to 3859 states and 4473 transitions. [2021-12-18 20:01:52,534 INFO L78 Accepts]: Start accepts. Automaton has 3859 states and 4473 transitions. Word has length 101 [2021-12-18 20:01:52,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:52,534 INFO L470 AbstractCegarLoop]: Abstraction has 3859 states and 4473 transitions. [2021-12-18 20:01:52,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.833333333333333) internal successors, (203), 43 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:52,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3859 states and 4473 transitions. [2021-12-18 20:01:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-18 20:01:52,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:52,537 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:52,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-18 20:01:52,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:52,756 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1402500025, now seen corresponding path program 16 times [2021-12-18 20:01:52,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782251062] [2021-12-18 20:01:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:52,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:53,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:53,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782251062] [2021-12-18 20:01:53,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782251062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:53,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627576511] [2021-12-18 20:01:53,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:01:53,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:53,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:53,208 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 20:01:53,210 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 20:01:53,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:01:53,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:53,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-18 20:01:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:53,368 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:01:53,369 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 20:01:53,842 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 20:01:54,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:01:54,852 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 20:01:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 210 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:54,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:55,768 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 20:01:55,770 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 20:01:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 209 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:56,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627576511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:56,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:56,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 83 [2021-12-18 20:01:56,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338518040] [2021-12-18 20:01:56,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:56,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-18 20:01:56,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:56,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-18 20:01:56,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=6264, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 20:01:56,839 INFO L87 Difference]: Start difference. First operand 3859 states and 4473 transitions. Second operand has 83 states, 83 states have (on average 3.4698795180722892) internal successors, (288), 83 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 20:01:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:59,621 INFO L93 Difference]: Finished difference Result 4711 states and 5398 transitions. [2021-12-18 20:01:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-18 20:01:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.4698795180722892) internal successors, (288), 83 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 102 [2021-12-18 20:01:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:59,643 INFO L225 Difference]: With dead ends: 4711 [2021-12-18 20:01:59,659 INFO L226 Difference]: Without dead ends: 4628 [2021-12-18 20:01:59,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5699 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1925, Invalid=19537, Unknown=0, NotChecked=0, Total=21462 [2021-12-18 20:01:59,660 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 365 mSDsluCounter, 2872 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 471 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:59,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 2965 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1846 Invalid, 0 Unknown, 471 Unchecked, 0.6s Time] [2021-12-18 20:01:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4628 states. [2021-12-18 20:01:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4628 to 4248. [2021-12-18 20:01:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4246 states have (on average 1.1599152143193594) internal successors, (4925), 4247 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 4925 transitions. [2021-12-18 20:01:59,713 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 4925 transitions. Word has length 102 [2021-12-18 20:01:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:59,713 INFO L470 AbstractCegarLoop]: Abstraction has 4248 states and 4925 transitions. [2021-12-18 20:01:59,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.4698795180722892) internal successors, (288), 83 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 20:01:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 4925 transitions. [2021-12-18 20:01:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-18 20:01:59,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:59,723 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:59,757 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 20:01:59,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:59,924 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:01:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:59,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1330470007, now seen corresponding path program 6 times [2021-12-18 20:01:59,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:59,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703600806] [2021-12-18 20:01:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:59,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:02:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:02:00,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:02:00,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703600806] [2021-12-18 20:02:00,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703600806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:02:00,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804521770] [2021-12-18 20:02:00,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:02:00,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:00,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:02:00,183 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 20:02:00,184 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 20:02:00,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-18 20:02:00,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:02:00,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 20:02:00,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:02:00,373 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:02:00,373 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 20:02:00,716 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 20:02:21,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:02:21,236 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 18 treesize of output 7 [2021-12-18 20:02:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 157 proven. 188 refuted. 20 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:02:21,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:02:22,125 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 20:02:22,127 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 20:02:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 177 proven. 188 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:02:22,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804521770] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:02:22,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:02:22,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 75 [2021-12-18 20:02:22,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917688950] [2021-12-18 20:02:22,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:02:22,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-18 20:02:22,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:02:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-18 20:02:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=5109, Unknown=4, NotChecked=0, Total=5550 [2021-12-18 20:02:22,988 INFO L87 Difference]: Start difference. First operand 4248 states and 4925 transitions. Second operand has 75 states, 75 states have (on average 3.88) internal successors, (291), 75 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:08,764 INFO L93 Difference]: Finished difference Result 4894 states and 5550 transitions. [2021-12-18 20:03:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-18 20:03:08,778 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.88) internal successors, (291), 75 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-18 20:03:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:08,783 INFO L225 Difference]: With dead ends: 4894 [2021-12-18 20:03:08,783 INFO L226 Difference]: Without dead ends: 4311 [2021-12-18 20:03:08,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3970 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=1490, Invalid=13998, Unknown=12, NotChecked=0, Total=15500 [2021-12-18 20:03:08,784 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 311 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:08,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 2083 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1467 Invalid, 0 Unknown, 385 Unchecked, 0.5s Time] [2021-12-18 20:03:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-12-18 20:03:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3731. [2021-12-18 20:03:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3729 states have (on average 1.1509788146956288) internal successors, (4292), 3730 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 4292 transitions. [2021-12-18 20:03:08,843 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 4292 transitions. Word has length 105 [2021-12-18 20:03:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:08,844 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 4292 transitions. [2021-12-18 20:03:08,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.88) internal successors, (291), 75 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 4292 transitions. [2021-12-18 20:03:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-18 20:03:08,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:08,857 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:08,893 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 20:03:09,075 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,SelfDestructingSolverStorable54 [2021-12-18 20:03:09,075 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1831533212, now seen corresponding path program 17 times [2021-12-18 20:03:09,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:09,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958956458] [2021-12-18 20:03:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:09,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 120 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:09,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:09,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958956458] [2021-12-18 20:03:09,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958956458] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:09,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423530146] [2021-12-18 20:03:09,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:03:09,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:09,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:09,507 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 20:03:09,508 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 20:03:09,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-18 20:03:09,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:09,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-18 20:03:09,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:09,692 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:03:09,693 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 20:03:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:10,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 190 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:11,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423530146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:11,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:11,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 73 [2021-12-18 20:03:11,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574708684] [2021-12-18 20:03:11,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:11,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-18 20:03:11,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:11,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-18 20:03:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=4783, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 20:03:11,550 INFO L87 Difference]: Start difference. First operand 3731 states and 4292 transitions. Second operand has 74 states, 73 states have (on average 4.082191780821918) internal successors, (298), 74 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:13,281 INFO L93 Difference]: Finished difference Result 6706 states and 7647 transitions. [2021-12-18 20:03:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-18 20:03:13,282 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 4.082191780821918) internal successors, (298), 74 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have 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 20:03:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:13,288 INFO L225 Difference]: With dead ends: 6706 [2021-12-18 20:03:13,288 INFO L226 Difference]: Without dead ends: 6706 [2021-12-18 20:03:13,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2834 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2637, Invalid=10703, Unknown=0, NotChecked=0, Total=13340 [2021-12-18 20:03:13,290 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 848 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:13,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 1918 Invalid, 2728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2667 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 20:03:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6706 states. [2021-12-18 20:03:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6706 to 4724. [2021-12-18 20:03:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4722 states have (on average 1.1607369758576873) internal successors, (5481), 4723 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 5481 transitions. [2021-12-18 20:03:13,327 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 5481 transitions. Word has length 106 [2021-12-18 20:03:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:13,328 INFO L470 AbstractCegarLoop]: Abstraction has 4724 states and 5481 transitions. [2021-12-18 20:03:13,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 4.082191780821918) internal successors, (298), 74 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:13,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 5481 transitions. [2021-12-18 20:03:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-18 20:03:13,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:13,330 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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 20:03:13,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:13,548 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,SelfDestructingSolverStorable55 [2021-12-18 20:03:13,548 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1106575132, now seen corresponding path program 2 times [2021-12-18 20:03:13,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:13,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173254532] [2021-12-18 20:03:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:13,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 265 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:03:13,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:13,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173254532] [2021-12-18 20:03:13,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173254532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:13,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676185166] [2021-12-18 20:03:13,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:03:13,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:13,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:13,942 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 20:03:13,971 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 20:03:14,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:03:14,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:14,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 160 conjunts are in the unsatisfiable core [2021-12-18 20:03:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:14,564 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 20:03:14,623 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:03:14,623 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 20:03:14,630 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 8 treesize of output 3 [2021-12-18 20:03:17,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:03:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:03:17,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:03:17,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:03:17,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 32 [2021-12-18 20:03:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 269 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:03:17,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:19,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:03:19,297 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 55 treesize of output 44 [2021-12-18 20:03:19,311 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-18 20:03:19,311 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 80 treesize of output 77 [2021-12-18 20:03:19,333 INFO L354 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2021-12-18 20:03:19,333 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 73 treesize of output 81 [2021-12-18 20:03:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 15 proven. 268 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:03:20,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676185166] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:20,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:20,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 38, 37] total 92 [2021-12-18 20:03:20,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490222916] [2021-12-18 20:03:20,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:20,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-18 20:03:20,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-18 20:03:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=8091, Unknown=1, NotChecked=0, Total=8372 [2021-12-18 20:03:20,173 INFO L87 Difference]: Start difference. First operand 4724 states and 5481 transitions. Second operand has 92 states, 92 states have (on average 3.141304347826087) internal successors, (289), 92 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:28,156 INFO L93 Difference]: Finished difference Result 7388 states and 8478 transitions. [2021-12-18 20:03:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-18 20:03:28,156 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.141304347826087) internal successors, (289), 92 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-18 20:03:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:28,161 INFO L225 Difference]: With dead ends: 7388 [2021-12-18 20:03:28,161 INFO L226 Difference]: Without dead ends: 5894 [2021-12-18 20:03:28,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 147 SyntacticMatches, 9 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1423, Invalid=27988, Unknown=1, NotChecked=0, Total=29412 [2021-12-18 20:03:28,163 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 1075 mSDsluCounter, 8086 mSDsCounter, 0 mSdLazyCounter, 5404 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 8273 SdHoareTripleChecker+Invalid, 7333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 5404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1759 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:28,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1075 Valid, 8273 Invalid, 7333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 5404 Invalid, 0 Unknown, 1759 Unchecked, 2.0s Time] [2021-12-18 20:03:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5894 states. [2021-12-18 20:03:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5894 to 3400. [2021-12-18 20:03:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 3398 states have (on average 1.1589170100058859) internal successors, (3938), 3399 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 3938 transitions. [2021-12-18 20:03:28,201 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 3938 transitions. Word has length 106 [2021-12-18 20:03:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:28,201 INFO L470 AbstractCegarLoop]: Abstraction has 3400 states and 3938 transitions. [2021-12-18 20:03:28,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.141304347826087) internal successors, (289), 92 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 3938 transitions. [2021-12-18 20:03:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-18 20:03:28,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:28,204 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 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] [2021-12-18 20:03:28,229 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 20:03:28,417 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,SelfDestructingSolverStorable56 [2021-12-18 20:03:28,417 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash -196905228, now seen corresponding path program 14 times [2021-12-18 20:03:28,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:28,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94380823] [2021-12-18 20:03:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:28,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:28,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:28,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94380823] [2021-12-18 20:03:28,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94380823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:28,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656476842] [2021-12-18 20:03:28,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:03:28,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:28,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:28,971 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 20:03:28,998 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 20:03:29,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:03:29,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-18 20:03:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:29,155 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 20:03:29,552 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 20:03:29,603 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 20:03:30,012 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 20:03:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:30,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:30,369 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1766) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) is different from false [2021-12-18 20:03:30,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:03:30,374 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 20:03:30,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:03:30,379 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 20:03:30,381 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 20:03:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:30,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656476842] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:30,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:30,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 60 [2021-12-18 20:03:30,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983177935] [2021-12-18 20:03:30,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:30,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 20:03:30,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 20:03:30,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3266, Unknown=1, NotChecked=114, Total=3540 [2021-12-18 20:03:30,657 INFO L87 Difference]: Start difference. First operand 3400 states and 3938 transitions. Second operand has 60 states, 60 states have (on average 3.566666666666667) internal successors, (214), 60 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:32,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:32,765 INFO L93 Difference]: Finished difference Result 5464 states and 6286 transitions. [2021-12-18 20:03:32,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-18 20:03:32,766 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.566666666666667) internal successors, (214), 60 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-18 20:03:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:32,769 INFO L225 Difference]: With dead ends: 5464 [2021-12-18 20:03:32,769 INFO L226 Difference]: Without dead ends: 4387 [2021-12-18 20:03:32,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 187 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=354, Invalid=8021, Unknown=1, NotChecked=180, Total=8556 [2021-12-18 20:03:32,770 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 182 mSDsluCounter, 4539 mSDsCounter, 0 mSdLazyCounter, 4369 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 4652 SdHoareTripleChecker+Invalid, 4639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:32,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 4652 Invalid, 4639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4369 Invalid, 0 Unknown, 255 Unchecked, 1.3s Time] [2021-12-18 20:03:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2021-12-18 20:03:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 3615. [2021-12-18 20:03:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3613 states have (on average 1.1588707445336286) internal successors, (4187), 3614 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 4187 transitions. [2021-12-18 20:03:32,815 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 4187 transitions. Word has length 109 [2021-12-18 20:03:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:32,820 INFO L470 AbstractCegarLoop]: Abstraction has 3615 states and 4187 transitions. [2021-12-18 20:03:32,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.566666666666667) internal successors, (214), 60 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 4187 transitions. [2021-12-18 20:03:32,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-18 20:03:32,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:32,823 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:32,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:33,039 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,SelfDestructingSolverStorable57 [2021-12-18 20:03:33,040 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash 499994957, now seen corresponding path program 18 times [2021-12-18 20:03:33,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:33,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782823515] [2021-12-18 20:03:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:33,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 32 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:33,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782823515] [2021-12-18 20:03:33,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782823515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300604908] [2021-12-18 20:03:33,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:03:33,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:33,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:33,508 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 20:03:33,508 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 20:03:33,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-18 20:03:33,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:33,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 134 conjunts are in the unsatisfiable core [2021-12-18 20:03:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:34,109 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 20:03:34,396 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 20:03:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 32 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:34,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:34,579 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 20:03:34,580 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 20:03:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 32 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:34,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300604908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:34,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:34,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 55 [2021-12-18 20:03:34,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509170057] [2021-12-18 20:03:34,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:34,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-18 20:03:34,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:34,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-18 20:03:34,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2808, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 20:03:34,753 INFO L87 Difference]: Start difference. First operand 3615 states and 4187 transitions. Second operand has 55 states, 55 states have (on average 3.2) internal successors, (176), 55 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:37,020 INFO L93 Difference]: Finished difference Result 6098 states and 7009 transitions. [2021-12-18 20:03:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-18 20:03:37,021 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.2) internal successors, (176), 55 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-18 20:03:37,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:37,026 INFO L225 Difference]: With dead ends: 6098 [2021-12-18 20:03:37,026 INFO L226 Difference]: Without dead ends: 6006 [2021-12-18 20:03:37,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 196 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=543, Invalid=6429, Unknown=0, NotChecked=0, Total=6972 [2021-12-18 20:03:37,027 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 557 mSDsluCounter, 5488 mSDsCounter, 0 mSdLazyCounter, 4110 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 5673 SdHoareTripleChecker+Invalid, 4353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:37,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 5673 Invalid, 4353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 4110 Invalid, 0 Unknown, 200 Unchecked, 1.4s Time] [2021-12-18 20:03:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2021-12-18 20:03:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 4099. [2021-12-18 20:03:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4099 states, 4097 states have (on average 1.1596289968269466) internal successors, (4751), 4098 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 4751 transitions. [2021-12-18 20:03:37,088 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 4751 transitions. Word has length 111 [2021-12-18 20:03:37,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:37,088 INFO L470 AbstractCegarLoop]: Abstraction has 4099 states and 4751 transitions. [2021-12-18 20:03:37,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.2) internal successors, (176), 55 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 4751 transitions. [2021-12-18 20:03:37,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 20:03:37,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:37,091 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 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] [2021-12-18 20:03:37,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-18 20:03:37,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:37,312 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1193680631, now seen corresponding path program 15 times [2021-12-18 20:03:37,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:37,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393202171] [2021-12-18 20:03:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:37,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 66 proven. 294 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:37,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:37,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393202171] [2021-12-18 20:03:37,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393202171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:37,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401686314] [2021-12-18 20:03:37,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:03:37,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:37,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:37,665 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 20:03:37,666 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 20:03:37,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-18 20:03:37,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:37,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-18 20:03:37,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 91 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:38,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:39,000 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 7 treesize of output 5 [2021-12-18 20:03:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 91 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:39,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401686314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:39,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:39,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2021-12-18 20:03:39,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301956606] [2021-12-18 20:03:39,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:39,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 20:03:39,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 20:03:39,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2666, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 20:03:39,070 INFO L87 Difference]: Start difference. First operand 4099 states and 4751 transitions. Second operand has 56 states, 55 states have (on average 5.290909090909091) internal successors, (291), 56 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:40,113 INFO L93 Difference]: Finished difference Result 6890 states and 7991 transitions. [2021-12-18 20:03:40,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 20:03:40,113 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 5.290909090909091) internal successors, (291), 56 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-18 20:03:40,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:40,119 INFO L225 Difference]: With dead ends: 6890 [2021-12-18 20:03:40,119 INFO L226 Difference]: Without dead ends: 6890 [2021-12-18 20:03:40,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1332, Invalid=5808, Unknown=0, NotChecked=0, Total=7140 [2021-12-18 20:03:40,120 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 570 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:40,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 2474 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:03:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6890 states. [2021-12-18 20:03:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6890 to 4344. [2021-12-18 20:03:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4344 states, 4342 states have (on average 1.1600644864117917) internal successors, (5037), 4343 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4344 states to 4344 states and 5037 transitions. [2021-12-18 20:03:40,166 INFO L78 Accepts]: Start accepts. Automaton has 4344 states and 5037 transitions. Word has length 113 [2021-12-18 20:03:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:40,166 INFO L470 AbstractCegarLoop]: Abstraction has 4344 states and 5037 transitions. [2021-12-18 20:03:40,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 5.290909090909091) internal successors, (291), 56 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4344 states and 5037 transitions. [2021-12-18 20:03:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-18 20:03:40,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:40,169 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:40,187 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 20:03:40,383 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,SelfDestructingSolverStorable59 [2021-12-18 20:03:40,383 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash -964080841, now seen corresponding path program 7 times [2021-12-18 20:03:40,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:40,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192224903] [2021-12-18 20:03:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:40,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 32 proven. 418 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:03:40,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:40,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192224903] [2021-12-18 20:03:40,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192224903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:40,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152438392] [2021-12-18 20:03:40,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:03:40,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:40,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:40,757 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 20:03:40,757 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 20:03:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-18 20:03:40,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:41,142 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 20:03:41,338 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 7 [2021-12-18 20:03:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 32 proven. 418 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:03:41,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:41,516 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 20:03:41,517 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 26 treesize of output 22 [2021-12-18 20:03:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 32 proven. 418 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:03:41,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152438392] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:41,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:41,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 51 [2021-12-18 20:03:41,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546966663] [2021-12-18 20:03:41,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:41,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-18 20:03:41,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:41,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-18 20:03:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 20:03:41,692 INFO L87 Difference]: Start difference. First operand 4344 states and 5037 transitions. Second operand has 51 states, 51 states have (on average 3.6666666666666665) internal successors, (187), 51 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 20:03:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:43,389 INFO L93 Difference]: Finished difference Result 5578 states and 6345 transitions. [2021-12-18 20:03:43,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 20:03:43,389 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6666666666666665) internal successors, (187), 51 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 114 [2021-12-18 20:03:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:43,393 INFO L225 Difference]: With dead ends: 5578 [2021-12-18 20:03:43,393 INFO L226 Difference]: Without dead ends: 4657 [2021-12-18 20:03:43,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 213 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=558, Invalid=5448, Unknown=0, NotChecked=0, Total=6006 [2021-12-18 20:03:43,394 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 746 mSDsluCounter, 4496 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 4661 SdHoareTripleChecker+Invalid, 3989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:43,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 4661 Invalid, 3989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3612 Invalid, 0 Unknown, 293 Unchecked, 1.0s Time] [2021-12-18 20:03:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2021-12-18 20:03:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 3598. [2021-12-18 20:03:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3596 states have (on average 1.1507230255839822) internal successors, (4138), 3597 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 4138 transitions. [2021-12-18 20:03:43,427 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 4138 transitions. Word has length 114 [2021-12-18 20:03:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:43,427 INFO L470 AbstractCegarLoop]: Abstraction has 3598 states and 4138 transitions. [2021-12-18 20:03:43,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6666666666666665) internal successors, (187), 51 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 20:03:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 4138 transitions. [2021-12-18 20:03:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-18 20:03:43,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:43,430 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:43,448 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 20:03:43,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:43,648 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:43,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2067150640, now seen corresponding path program 19 times [2021-12-18 20:03:43,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:43,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221216389] [2021-12-18 20:03:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:43,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 153 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:44,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:44,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221216389] [2021-12-18 20:03:44,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221216389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:44,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537632012] [2021-12-18 20:03:44,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:03:44,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:44,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:44,073 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 20:03:44,073 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 20:03:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:44,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-18 20:03:44,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:44,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:45,209 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 20:03:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:45,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537632012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:45,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:45,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 62 [2021-12-18 20:03:45,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735311175] [2021-12-18 20:03:45,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:45,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-18 20:03:45,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:45,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-18 20:03:45,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=3497, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 20:03:45,290 INFO L87 Difference]: Start difference. First operand 3598 states and 4138 transitions. Second operand has 63 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 63 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:47,348 INFO L93 Difference]: Finished difference Result 5992 states and 6833 transitions. [2021-12-18 20:03:47,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-18 20:03:47,349 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 63 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-12-18 20:03:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:47,353 INFO L225 Difference]: With dead ends: 5992 [2021-12-18 20:03:47,353 INFO L226 Difference]: Without dead ends: 5992 [2021-12-18 20:03:47,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1866, Invalid=8034, Unknown=0, NotChecked=0, Total=9900 [2021-12-18 20:03:47,353 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 932 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 3227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:47,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [932 Valid, 2115 Invalid, 3227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3141 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 20:03:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5992 states. [2021-12-18 20:03:47,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5992 to 4528. [2021-12-18 20:03:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4526 states have (on average 1.160627485638533) internal successors, (5253), 4527 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 20:03:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 5253 transitions. [2021-12-18 20:03:47,386 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 5253 transitions. Word has length 115 [2021-12-18 20:03:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:47,386 INFO L470 AbstractCegarLoop]: Abstraction has 4528 states and 5253 transitions. [2021-12-18 20:03:47,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 63 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 5253 transitions. [2021-12-18 20:03:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 20:03:47,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:47,389 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:47,408 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 20:03:47,603 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,SelfDestructingSolverStorable61 [2021-12-18 20:03:47,603 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1113206431, now seen corresponding path program 20 times [2021-12-18 20:03:47,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:47,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42646936] [2021-12-18 20:03:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:47,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:48,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:48,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42646936] [2021-12-18 20:03:48,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42646936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:48,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385181740] [2021-12-18 20:03:48,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:03:48,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:48,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:48,095 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 20:03:48,095 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 20:03:48,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:03:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-18 20:03:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:48,575 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 20:03:48,809 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 20:03:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:48,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:48,998 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 20:03:49,000 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 20:03:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:49,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385181740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:49,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:49,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 57 [2021-12-18 20:03:49,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108738804] [2021-12-18 20:03:49,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:49,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 20:03:49,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 20:03:49,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 20:03:49,189 INFO L87 Difference]: Start difference. First operand 4528 states and 5253 transitions. Second operand has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 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 20:03:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:51,582 INFO L93 Difference]: Finished difference Result 7315 states and 8426 transitions. [2021-12-18 20:03:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-18 20:03:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 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 120 [2021-12-18 20:03:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:51,589 INFO L225 Difference]: With dead ends: 7315 [2021-12-18 20:03:51,589 INFO L226 Difference]: Without dead ends: 7218 [2021-12-18 20:03:51,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 214 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=508, Invalid=7148, Unknown=0, NotChecked=0, Total=7656 [2021-12-18 20:03:51,590 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 550 mSDsluCounter, 6228 mSDsCounter, 0 mSdLazyCounter, 4916 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 5214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:51,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 6431 Invalid, 5214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4916 Invalid, 0 Unknown, 261 Unchecked, 1.5s Time] [2021-12-18 20:03:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7218 states. [2021-12-18 20:03:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7218 to 5052. [2021-12-18 20:03:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5050 states have (on average 1.1613861386138613) internal successors, (5865), 5051 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 5865 transitions. [2021-12-18 20:03:51,694 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 5865 transitions. Word has length 120 [2021-12-18 20:03:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:51,694 INFO L470 AbstractCegarLoop]: Abstraction has 5052 states and 5865 transitions. [2021-12-18 20:03:51,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 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 20:03:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 5865 transitions. [2021-12-18 20:03:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-18 20:03:51,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:51,719 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 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] [2021-12-18 20:03:51,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-18 20:03:51,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:51,935 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:03:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1939361278, now seen corresponding path program 16 times [2021-12-18 20:03:51,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:51,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443520317] [2021-12-18 20:03:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:51,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 18 proven. 408 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:03:52,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:52,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443520317] [2021-12-18 20:03:52,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443520317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:52,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368862152] [2021-12-18 20:03:52,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:03:52,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:52,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:52,582 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 20:03:52,585 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 20:03:52,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:03:52,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:52,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-18 20:03:52,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:52,785 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:03:52,785 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 20:03:53,876 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 20:03:53,981 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:03:53,981 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-18 20:03:53,989 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 7 treesize of output 3 [2021-12-18 20:03:56,325 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:03:56,325 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 23 treesize of output 19 [2021-12-18 20:03:56,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:03:56,589 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-12-18 20:03:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 241 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:56,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:58,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:03:58,457 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 24 treesize of output 25 [2021-12-18 20:03:58,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:03:58,463 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 40 treesize of output 40 [2021-12-18 20:03:58,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:03:58,468 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 30 treesize of output 30 [2021-12-18 20:03:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 208 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:03:59,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368862152] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:59,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:59,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 40, 40] total 106 [2021-12-18 20:03:59,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254838303] [2021-12-18 20:03:59,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:59,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-12-18 20:03:59,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:59,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-12-18 20:03:59,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=10384, Unknown=3, NotChecked=0, Total=11130 [2021-12-18 20:03:59,964 INFO L87 Difference]: Start difference. First operand 5052 states and 5865 transitions. Second operand has 106 states, 106 states have (on average 3.2547169811320753) internal successors, (345), 106 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:08,300 INFO L93 Difference]: Finished difference Result 12796 states and 14919 transitions. [2021-12-18 20:04:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-18 20:04:08,300 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.2547169811320753) internal successors, (345), 106 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-18 20:04:08,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:08,310 INFO L225 Difference]: With dead ends: 12796 [2021-12-18 20:04:08,310 INFO L226 Difference]: Without dead ends: 12721 [2021-12-18 20:04:08,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 194 SyntacticMatches, 9 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13418 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=3203, Invalid=45856, Unknown=3, NotChecked=0, Total=49062 [2021-12-18 20:04:08,312 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 874 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 2708 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 3871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1001 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:08,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 1994 Invalid, 3871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2708 Invalid, 0 Unknown, 1001 Unchecked, 0.9s Time] [2021-12-18 20:04:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12721 states. [2021-12-18 20:04:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12721 to 10007. [2021-12-18 20:04:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10007 states, 10005 states have (on average 1.1665167416291855) internal successors, (11671), 10006 states have internal predecessors, (11671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10007 states to 10007 states and 11671 transitions. [2021-12-18 20:04:08,399 INFO L78 Accepts]: Start accepts. Automaton has 10007 states and 11671 transitions. Word has length 121 [2021-12-18 20:04:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:08,399 INFO L470 AbstractCegarLoop]: Abstraction has 10007 states and 11671 transitions. [2021-12-18 20:04:08,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.2547169811320753) internal successors, (345), 106 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10007 states and 11671 transitions. [2021-12-18 20:04:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-18 20:04:08,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:08,405 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:08,425 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 20:04:08,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:08,623 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash 771443421, now seen corresponding path program 8 times [2021-12-18 20:04:08,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:08,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371409895] [2021-12-18 20:04:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:08,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 35 proven. 509 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:04:09,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:09,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371409895] [2021-12-18 20:04:09,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371409895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:09,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32642857] [2021-12-18 20:04:09,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:09,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:09,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:09,059 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 20:04:09,060 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 20:04:09,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:04:09,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-18 20:04:09,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:09,503 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 20:04:11,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:11,170 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 20 treesize of output 20 [2021-12-18 20:04:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 153 proven. 391 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:04:11,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:12,814 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 20:04:12,819 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 20:04:12,822 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 35 treesize of output 27 [2021-12-18 20:04:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 153 proven. 391 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:04:12,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32642857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:12,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:12,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 82 [2021-12-18 20:04:12,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242818479] [2021-12-18 20:04:12,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:12,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-18 20:04:12,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-18 20:04:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=6228, Unknown=0, NotChecked=0, Total=6642 [2021-12-18 20:04:12,932 INFO L87 Difference]: Start difference. First operand 10007 states and 11671 transitions. Second operand has 82 states, 82 states have (on average 3.731707317073171) internal successors, (306), 82 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:18,952 INFO L93 Difference]: Finished difference Result 13533 states and 15487 transitions. [2021-12-18 20:04:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-18 20:04:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.731707317073171) internal successors, (306), 82 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have 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 20:04:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:18,962 INFO L225 Difference]: With dead ends: 13533 [2021-12-18 20:04:18,962 INFO L226 Difference]: Without dead ends: 12524 [2021-12-18 20:04:18,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6729 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1739, Invalid=24021, Unknown=0, NotChecked=0, Total=25760 [2021-12-18 20:04:18,964 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 803 mSDsluCounter, 4813 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 4988 SdHoareTripleChecker+Invalid, 4378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1216 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:18,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 4988 Invalid, 4378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3128 Invalid, 0 Unknown, 1216 Unchecked, 1.1s Time] [2021-12-18 20:04:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12524 states. [2021-12-18 20:04:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12524 to 9091. [2021-12-18 20:04:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9091 states, 9089 states have (on average 1.1600836175596876) internal successors, (10544), 9090 states have internal predecessors, (10544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9091 states to 9091 states and 10544 transitions. [2021-12-18 20:04:19,070 INFO L78 Accepts]: Start accepts. Automaton has 9091 states and 10544 transitions. Word has length 123 [2021-12-18 20:04:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:19,070 INFO L470 AbstractCegarLoop]: Abstraction has 9091 states and 10544 transitions. [2021-12-18 20:04:19,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.731707317073171) internal successors, (306), 82 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 9091 states and 10544 transitions. [2021-12-18 20:04:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 20:04:19,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:19,075 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:19,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-18 20:04:19,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:19,293 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1756095170, now seen corresponding path program 21 times [2021-12-18 20:04:19,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:19,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294468011] [2021-12-18 20:04:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:19,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 190 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:19,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:19,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294468011] [2021-12-18 20:04:19,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294468011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:19,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592613381] [2021-12-18 20:04:19,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:19,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:19,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:19,803 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 20:04:19,804 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 20:04:20,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-18 20:04:20,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-18 20:04:20,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:20,115 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:20,115 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 20:04:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:21,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 276 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:22,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592613381] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:22,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:22,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2021-12-18 20:04:22,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292148831] [2021-12-18 20:04:22,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:22,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-18 20:04:22,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:22,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-18 20:04:22,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=7460, Unknown=0, NotChecked=0, Total=8372 [2021-12-18 20:04:22,731 INFO L87 Difference]: Start difference. First operand 9091 states and 10544 transitions. Second operand has 92 states, 91 states have (on average 4.0) internal successors, (364), 92 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:26,424 INFO L93 Difference]: Finished difference Result 14776 states and 16992 transitions. [2021-12-18 20:04:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-18 20:04:26,424 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 4.0) internal successors, (364), 92 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have 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 20:04:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:26,436 INFO L225 Difference]: With dead ends: 14776 [2021-12-18 20:04:26,437 INFO L226 Difference]: Without dead ends: 14776 [2021-12-18 20:04:26,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4525 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4763, Invalid=18493, Unknown=0, NotChecked=0, Total=23256 [2021-12-18 20:04:26,438 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1231 mSDsluCounter, 2342 mSDsCounter, 0 mSdLazyCounter, 3546 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 2443 SdHoareTripleChecker+Invalid, 3646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:26,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1231 Valid, 2443 Invalid, 3646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3546 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 20:04:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14776 states. [2021-12-18 20:04:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14776 to 11158. [2021-12-18 20:04:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11158 states, 11156 states have (on average 1.1673538902832556) internal successors, (13023), 11157 states have internal predecessors, (13023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11158 states to 11158 states and 13023 transitions. [2021-12-18 20:04:26,547 INFO L78 Accepts]: Start accepts. Automaton has 11158 states and 13023 transitions. Word has length 124 [2021-12-18 20:04:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:26,547 INFO L470 AbstractCegarLoop]: Abstraction has 11158 states and 13023 transitions. [2021-12-18 20:04:26,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 4.0) internal successors, (364), 92 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:26,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11158 states and 13023 transitions. [2021-12-18 20:04:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-18 20:04:26,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:26,553 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:26,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-18 20:04:26,767 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,SelfDestructingSolverStorable65 [2021-12-18 20:04:26,767 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:26,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:26,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1679256965, now seen corresponding path program 17 times [2021-12-18 20:04:26,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:26,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83660180] [2021-12-18 20:04:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:26,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 91 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:27,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:27,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83660180] [2021-12-18 20:04:27,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83660180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:27,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559009261] [2021-12-18 20:04:27,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:04:27,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:27,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:27,090 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 20:04:27,091 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 20:04:27,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-18 20:04:27,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:27,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-18 20:04:27,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:27,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:28,448 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 20:04:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:28,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559009261] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:28,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:28,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 58 [2021-12-18 20:04:28,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801207317] [2021-12-18 20:04:28,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:28,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-18 20:04:28,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:28,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-18 20:04:28,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2988, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 20:04:28,927 INFO L87 Difference]: Start difference. First operand 11158 states and 13023 transitions. Second operand has 59 states, 58 states have (on average 5.086206896551724) internal successors, (295), 59 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:30,123 INFO L93 Difference]: Finished difference Result 14505 states and 16909 transitions. [2021-12-18 20:04:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-18 20:04:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 5.086206896551724) internal successors, (295), 59 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-18 20:04:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:30,136 INFO L225 Difference]: With dead ends: 14505 [2021-12-18 20:04:30,136 INFO L226 Difference]: Without dead ends: 14505 [2021-12-18 20:04:30,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1678, Invalid=6512, Unknown=0, NotChecked=0, Total=8190 [2021-12-18 20:04:30,138 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 1032 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:30,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 2284 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:04:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14505 states. [2021-12-18 20:04:30,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14505 to 11524. [2021-12-18 20:04:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11524 states, 11522 states have (on average 1.167418850893942) internal successors, (13451), 11523 states have internal predecessors, (13451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11524 states to 11524 states and 13451 transitions. [2021-12-18 20:04:30,229 INFO L78 Accepts]: Start accepts. Automaton has 11524 states and 13451 transitions. Word has length 125 [2021-12-18 20:04:30,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:30,229 INFO L470 AbstractCegarLoop]: Abstraction has 11524 states and 13451 transitions. [2021-12-18 20:04:30,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 5.086206896551724) internal successors, (295), 59 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand 11524 states and 13451 transitions. [2021-12-18 20:04:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-18 20:04:30,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:30,235 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:30,253 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 20:04:30,447 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,SelfDestructingSolverStorable66 [2021-12-18 20:04:30,448 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1004203597, now seen corresponding path program 22 times [2021-12-18 20:04:30,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:30,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221455417] [2021-12-18 20:04:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:30,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:31,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:31,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221455417] [2021-12-18 20:04:31,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221455417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:31,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285931747] [2021-12-18 20:04:31,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:04:31,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:31,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:31,084 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 20:04:31,084 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 20:04:31,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:04:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:31,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-18 20:04:31,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:31,279 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:31,279 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 20:04:32,173 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 20:04:33,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:04:33,181 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 20:04:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 369 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:33,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:34,197 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 20:04:34,200 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 20:04:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 368 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:35,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285931747] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:35,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:35,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 101 [2021-12-18 20:04:35,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691519556] [2021-12-18 20:04:35,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:35,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-18 20:04:35,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:35,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-18 20:04:35,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=9297, Unknown=0, NotChecked=0, Total=10100 [2021-12-18 20:04:35,298 INFO L87 Difference]: Start difference. First operand 11524 states and 13451 transitions. Second operand has 101 states, 101 states have (on average 3.6534653465346536) internal successors, (369), 101 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:39,781 INFO L93 Difference]: Finished difference Result 12894 states and 14937 transitions. [2021-12-18 20:04:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-18 20:04:39,782 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.6534653465346536) internal successors, (369), 101 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-18 20:04:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:39,790 INFO L225 Difference]: With dead ends: 12894 [2021-12-18 20:04:39,791 INFO L226 Difference]: Without dead ends: 12788 [2021-12-18 20:04:39,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8754 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2752, Invalid=29110, Unknown=0, NotChecked=0, Total=31862 [2021-12-18 20:04:39,792 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 338 mSDsluCounter, 4155 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 4272 SdHoareTripleChecker+Invalid, 3304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:39,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 4272 Invalid, 3304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2813 Invalid, 0 Unknown, 436 Unchecked, 0.9s Time] [2021-12-18 20:04:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12788 states. [2021-12-18 20:04:39,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12788 to 12158. [2021-12-18 20:04:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12158 states, 12156 states have (on average 1.1675715695952615) internal successors, (14193), 12157 states have internal predecessors, (14193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12158 states to 12158 states and 14193 transitions. [2021-12-18 20:04:39,877 INFO L78 Accepts]: Start accepts. Automaton has 12158 states and 14193 transitions. Word has length 129 [2021-12-18 20:04:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:39,878 INFO L470 AbstractCegarLoop]: Abstraction has 12158 states and 14193 transitions. [2021-12-18 20:04:39,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.6534653465346536) internal successors, (369), 101 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 12158 states and 14193 transitions. [2021-12-18 20:04:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-18 20:04:39,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:39,883 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 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 20:04:39,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:40,097 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,SelfDestructingSolverStorable67 [2021-12-18 20:04:40,098 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:40,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:40,098 INFO L85 PathProgramCache]: Analyzing trace with hash 251620040, now seen corresponding path program 3 times [2021-12-18 20:04:40,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:40,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524105780] [2021-12-18 20:04:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:40,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 449 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:04:40,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:40,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524105780] [2021-12-18 20:04:40,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524105780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:40,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811176722] [2021-12-18 20:04:40,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:40,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:40,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:40,567 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 20:04:40,568 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 20:04:40,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-18 20:04:40,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:40,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 134 conjunts are in the unsatisfiable core [2021-12-18 20:04:40,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:40,909 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:40,909 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 20:04:41,546 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 20:04:41,618 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-12-18 20:04:41,618 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-18 20:04:44,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:04:44,134 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-18 20:04:44,135 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 10 [2021-12-18 20:04:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 19 proven. 448 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:04:44,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:45,706 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 56 treesize of output 50 [2021-12-18 20:04:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 467 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:04:47,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811176722] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:47,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:47,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 29] total 82 [2021-12-18 20:04:47,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806873243] [2021-12-18 20:04:47,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:47,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-18 20:04:47,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:47,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-18 20:04:47,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=6392, Unknown=0, NotChecked=0, Total=6642 [2021-12-18 20:04:47,080 INFO L87 Difference]: Start difference. First operand 12158 states and 14193 transitions. Second operand has 82 states, 82 states have (on average 4.378048780487805) internal successors, (359), 82 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:49,053 INFO L93 Difference]: Finished difference Result 12137 states and 14082 transitions. [2021-12-18 20:04:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 20:04:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 4.378048780487805) internal successors, (359), 82 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-12-18 20:04:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:49,061 INFO L225 Difference]: With dead ends: 12137 [2021-12-18 20:04:49,062 INFO L226 Difference]: Without dead ends: 8481 [2021-12-18 20:04:49,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=399, Invalid=10313, Unknown=0, NotChecked=0, Total=10712 [2021-12-18 20:04:49,063 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 271 mSDsluCounter, 3360 mSDsCounter, 0 mSdLazyCounter, 2614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 3455 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:49,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 3455 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2614 Invalid, 0 Unknown, 728 Unchecked, 0.9s Time] [2021-12-18 20:04:49,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8481 states. [2021-12-18 20:04:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8481 to 6494. [2021-12-18 20:04:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6494 states, 6492 states have (on average 1.162969808995687) internal successors, (7550), 6493 states have internal predecessors, (7550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6494 states to 6494 states and 7550 transitions. [2021-12-18 20:04:49,134 INFO L78 Accepts]: Start accepts. Automaton has 6494 states and 7550 transitions. Word has length 130 [2021-12-18 20:04:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:49,134 INFO L470 AbstractCegarLoop]: Abstraction has 6494 states and 7550 transitions. [2021-12-18 20:04:49,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 4.378048780487805) internal successors, (359), 82 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 6494 states and 7550 transitions. [2021-12-18 20:04:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-18 20:04:49,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:49,138 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:49,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:49,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-18 20:04:49,356 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:04:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash -438419631, now seen corresponding path program 9 times [2021-12-18 20:04:49,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:49,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48277005] [2021-12-18 20:04:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:49,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 38 proven. 609 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:04:49,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:49,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48277005] [2021-12-18 20:04:49,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48277005] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:49,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399777369] [2021-12-18 20:04:49,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:49,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:49,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:49,838 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 20:04:49,838 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 20:04:50,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-18 20:04:50,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:50,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-18 20:04:50,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:50,232 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:50,232 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 20:04:50,801 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 20:05:40,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:40,888 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 20 treesize of output 20 [2021-12-18 20:05:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 190 proven. 457 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:05:41,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:43,315 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 20:05:43,317 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 20:05:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 231 proven. 416 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:05:45,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399777369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:45,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:45,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 99 [2021-12-18 20:05:45,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954757619] [2021-12-18 20:05:45,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:45,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-18 20:05:45,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:45,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-18 20:05:45,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=9037, Unknown=4, NotChecked=0, Total=9702 [2021-12-18 20:05:45,258 INFO L87 Difference]: Start difference. First operand 6494 states and 7550 transitions. Second operand has 99 states, 99 states have (on average 3.8585858585858586) internal successors, (382), 99 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:19,458 INFO L93 Difference]: Finished difference Result 8251 states and 9410 transitions. [2021-12-18 20:06:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-18 20:06:19,459 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.8585858585858586) internal successors, (382), 99 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have 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 20:06:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:19,464 INFO L225 Difference]: With dead ends: 8251 [2021-12-18 20:06:19,464 INFO L226 Difference]: Without dead ends: 7071 [2021-12-18 20:06:19,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 201 SyntacticMatches, 22 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11922 ImplicationChecksByTransitivity, 84.1s TimeCoverageRelationStatistics Valid=3458, Invalid=33590, Unknown=8, NotChecked=0, Total=37056 [2021-12-18 20:06:19,465 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 1897 mSDsluCounter, 5469 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1897 SdHoareTripleChecker+Valid, 5616 SdHoareTripleChecker+Invalid, 6012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1207 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:19,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1897 Valid, 5616 Invalid, 6012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4712 Invalid, 0 Unknown, 1207 Unchecked, 1.8s Time] [2021-12-18 20:06:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7071 states. [2021-12-18 20:06:19,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7071 to 5485. [2021-12-18 20:06:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5485 states, 5483 states have (on average 1.155389385372971) internal successors, (6335), 5484 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 6335 transitions. [2021-12-18 20:06:19,509 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 6335 transitions. Word has length 132 [2021-12-18 20:06:19,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:19,510 INFO L470 AbstractCegarLoop]: Abstraction has 5485 states and 6335 transitions. [2021-12-18 20:06:19,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.8585858585858586) internal successors, (382), 99 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 6335 transitions. [2021-12-18 20:06:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-18 20:06:19,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:19,513 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:19,531 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 20:06:19,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-18 20:06:19,731 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:06:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1438764662, now seen corresponding path program 23 times [2021-12-18 20:06:19,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:19,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856572272] [2021-12-18 20:06:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:19,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 231 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:06:20,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856572272] [2021-12-18 20:06:20,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856572272] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:20,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441158155] [2021-12-18 20:06:20,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:06:20,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:20,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:20,348 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 20:06:20,348 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 20:06:20,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-18 20:06:20,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:20,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 143 conjunts are in the unsatisfiable core [2021-12-18 20:06:20,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:20,648 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:06:20,648 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 20:06:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 276 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:06:22,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 325 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:06:24,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441158155] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:24,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:24,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 91 [2021-12-18 20:06:24,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52823656] [2021-12-18 20:06:24,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:24,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-18 20:06:24,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-18 20:06:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=7423, Unknown=0, NotChecked=0, Total=8372 [2021-12-18 20:06:24,014 INFO L87 Difference]: Start difference. First operand 5485 states and 6335 transitions. Second operand has 92 states, 91 states have (on average 4.164835164835165) internal successors, (379), 92 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:27,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:27,349 INFO L93 Difference]: Finished difference Result 8453 states and 9674 transitions. [2021-12-18 20:06:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-18 20:06:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 4.164835164835165) internal successors, (379), 92 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-18 20:06:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:27,357 INFO L225 Difference]: With dead ends: 8453 [2021-12-18 20:06:27,357 INFO L226 Difference]: Without dead ends: 8453 [2021-12-18 20:06:27,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4619 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4170, Invalid=17000, Unknown=0, NotChecked=0, Total=21170 [2021-12-18 20:06:27,360 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 877 mSDsluCounter, 2877 mSDsCounter, 0 mSdLazyCounter, 4245 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 4314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:27,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 2990 Invalid, 4314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4245 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-18 20:06:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2021-12-18 20:06:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 6705. [2021-12-18 20:06:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6705 states, 6703 states have (on average 1.163359689691183) internal successors, (7798), 6704 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6705 states to 6705 states and 7798 transitions. [2021-12-18 20:06:27,456 INFO L78 Accepts]: Start accepts. Automaton has 6705 states and 7798 transitions. Word has length 133 [2021-12-18 20:06:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:27,456 INFO L470 AbstractCegarLoop]: Abstraction has 6705 states and 7798 transitions. [2021-12-18 20:06:27,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 4.164835164835165) internal successors, (379), 92 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6705 states and 7798 transitions. [2021-12-18 20:06:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-18 20:06:27,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:27,460 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 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] [2021-12-18 20:06:27,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-18 20:06:27,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:27,665 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:06:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1075876496, now seen corresponding path program 18 times [2021-12-18 20:06:27,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:27,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406617791] [2021-12-18 20:06:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:27,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:28,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:28,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406617791] [2021-12-18 20:06:28,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406617791] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:28,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282870752] [2021-12-18 20:06:28,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:06:28,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:28,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:28,362 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 20:06:28,363 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 20:06:28,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-18 20:06:28,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:28,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 165 conjunts are in the unsatisfiable core [2021-12-18 20:06:28,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:28,714 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 20:06:29,229 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 20:06:29,294 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 20:06:31,030 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:06:31,030 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 20:06:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:31,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:31,533 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2653 (Array Int Int))) (let ((.cse0 (select v_ArrVal_2653 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2653) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) .cse0)) (= 0 .cse0)))) is different from false [2021-12-18 20:06:31,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:31,537 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 26 treesize of output 27 [2021-12-18 20:06:31,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:31,540 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 44 treesize of output 44 [2021-12-18 20:06:31,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:31,545 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 32 treesize of output 32 [2021-12-18 20:06:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:32,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282870752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:32,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:32,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 37] total 92 [2021-12-18 20:06:32,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061607736] [2021-12-18 20:06:32,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:32,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-18 20:06:32,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:32,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-18 20:06:32,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=7905, Unknown=1, NotChecked=178, Total=8372 [2021-12-18 20:06:32,167 INFO L87 Difference]: Start difference. First operand 6705 states and 7798 transitions. Second operand has 92 states, 92 states have (on average 3.5) internal successors, (322), 92 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:34,083 INFO L93 Difference]: Finished difference Result 13901 states and 16172 transitions. [2021-12-18 20:06:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-18 20:06:34,083 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.5) internal successors, (322), 92 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-18 20:06:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:34,094 INFO L225 Difference]: With dead ends: 13901 [2021-12-18 20:06:34,094 INFO L226 Difference]: Without dead ends: 13818 [2021-12-18 20:06:34,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2413 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=482, Invalid=13563, Unknown=1, NotChecked=234, Total=14280 [2021-12-18 20:06:34,095 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 388 mSDsluCounter, 5852 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 5979 SdHoareTripleChecker+Invalid, 4011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1124 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:34,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 5979 Invalid, 4011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2866 Invalid, 0 Unknown, 1124 Unchecked, 0.8s Time] [2021-12-18 20:06:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13818 states. [2021-12-18 20:06:34,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13818 to 10701. [2021-12-18 20:06:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10701 states, 10699 states have (on average 1.1655294887372651) internal successors, (12470), 10700 states have internal predecessors, (12470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10701 states to 10701 states and 12470 transitions. [2021-12-18 20:06:34,180 INFO L78 Accepts]: Start accepts. Automaton has 10701 states and 12470 transitions. Word has length 133 [2021-12-18 20:06:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:34,180 INFO L470 AbstractCegarLoop]: Abstraction has 10701 states and 12470 transitions. [2021-12-18 20:06:34,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.5) internal successors, (322), 92 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 10701 states and 12470 transitions. [2021-12-18 20:06:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-18 20:06:34,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:34,185 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 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] [2021-12-18 20:06:34,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-18 20:06:34,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:34,403 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:06:34,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:34,403 INFO L85 PathProgramCache]: Analyzing trace with hash -870571629, now seen corresponding path program 19 times [2021-12-18 20:06:34,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:34,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480893892] [2021-12-18 20:06:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:34,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 120 proven. 450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:34,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480893892] [2021-12-18 20:06:34,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480893892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490144108] [2021-12-18 20:06:34,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:06:34,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:34,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:34,784 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 20:06:34,784 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 20:06:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:35,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-18 20:06:35,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 153 proven. 417 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:35,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:35,851 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 20:06:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 153 proven. 417 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:35,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490144108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:35,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:35,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 54 [2021-12-18 20:06:35,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49735202] [2021-12-18 20:06:35,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:35,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-18 20:06:35,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:35,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-18 20:06:35,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2637, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 20:06:35,911 INFO L87 Difference]: Start difference. First operand 10701 states and 12470 transitions. Second operand has 55 states, 54 states have (on average 5.092592592592593) internal successors, (275), 55 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:37,431 INFO L93 Difference]: Finished difference Result 15783 states and 18410 transitions. [2021-12-18 20:06:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 20:06:37,432 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 5.092592592592593) internal successors, (275), 55 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-12-18 20:06:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:37,445 INFO L225 Difference]: With dead ends: 15783 [2021-12-18 20:06:37,445 INFO L226 Difference]: Without dead ends: 15783 [2021-12-18 20:06:37,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1484, Invalid=6526, Unknown=0, NotChecked=0, Total=8010 [2021-12-18 20:06:37,453 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 818 mSDsluCounter, 3384 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:37,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 3549 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 20:06:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15783 states. [2021-12-18 20:06:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15783 to 11135. [2021-12-18 20:06:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11135 states, 11133 states have (on average 1.1657235246564268) internal successors, (12978), 11134 states have internal predecessors, (12978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11135 states to 11135 states and 12978 transitions. [2021-12-18 20:06:37,550 INFO L78 Accepts]: Start accepts. Automaton has 11135 states and 12978 transitions. Word has length 137 [2021-12-18 20:06:37,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:37,550 INFO L470 AbstractCegarLoop]: Abstraction has 11135 states and 12978 transitions. [2021-12-18 20:06:37,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 5.092592592592593) internal successors, (275), 55 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:37,551 INFO L276 IsEmpty]: Start isEmpty. Operand 11135 states and 12978 transitions. [2021-12-18 20:06:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-18 20:06:37,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:37,557 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:37,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:37,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:37,764 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:06:37,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:37,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1798136699, now seen corresponding path program 24 times [2021-12-18 20:06:37,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:37,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226153358] [2021-12-18 20:06:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:37,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 41 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:06:38,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:38,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226153358] [2021-12-18 20:06:38,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226153358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:38,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450135393] [2021-12-18 20:06:38,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:06:38,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:38,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:38,349 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 20:06:38,350 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 20:06:38,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-18 20:06:38,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:38,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 160 conjunts are in the unsatisfiable core [2021-12-18 20:06:38,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:39,385 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 20:06:39,662 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 20:06:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 41 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:06:39,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:39,962 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 20:06:39,964 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 20:06:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 41 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:06:40,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450135393] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:40,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:40,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 63 [2021-12-18 20:06:40,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469622056] [2021-12-18 20:06:40,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:40,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-18 20:06:40,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:40,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-18 20:06:40,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 20:06:40,165 INFO L87 Difference]: Start difference. First operand 11135 states and 12978 transitions. Second operand has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:43,243 INFO L93 Difference]: Finished difference Result 16330 states and 18784 transitions. [2021-12-18 20:06:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-18 20:06:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-12-18 20:06:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:43,257 INFO L225 Difference]: With dead ends: 16330 [2021-12-18 20:06:43,258 INFO L226 Difference]: Without dead ends: 15263 [2021-12-18 20:06:43,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=698, Invalid=8808, Unknown=0, NotChecked=0, Total=9506 [2021-12-18 20:06:43,259 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 814 mSDsluCounter, 8865 mSDsCounter, 0 mSdLazyCounter, 7307 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 9102 SdHoareTripleChecker+Invalid, 7407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 7307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:43,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 9102 Invalid, 7407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 7307 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-18 20:06:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15263 states. [2021-12-18 20:06:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15263 to 12555. [2021-12-18 20:06:43,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12555 states, 12553 states have (on average 1.1663347406994344) internal successors, (14641), 12554 states have internal predecessors, (14641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12555 states to 12555 states and 14641 transitions. [2021-12-18 20:06:43,410 INFO L78 Accepts]: Start accepts. Automaton has 12555 states and 14641 transitions. Word has length 138 [2021-12-18 20:06:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:43,411 INFO L470 AbstractCegarLoop]: Abstraction has 12555 states and 14641 transitions. [2021-12-18 20:06:43,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 12555 states and 14641 transitions. [2021-12-18 20:06:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-18 20:06:43,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:43,416 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:43,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:43,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:43,631 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:06:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash -967959485, now seen corresponding path program 10 times [2021-12-18 20:06:43,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:43,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549904141] [2021-12-18 20:06:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:43,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 41 proven. 718 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:06:44,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:44,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549904141] [2021-12-18 20:06:44,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549904141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:44,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945621371] [2021-12-18 20:06:44,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:06:44,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:44,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:44,169 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 20:06:44,170 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 20:06:44,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:06:44,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:44,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-18 20:06:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:44,377 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:06:44,378 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 20:06:45,099 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 20:06:46,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:06:46,330 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 20:06:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 372 proven. 387 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:06:46,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:47,405 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 20:06:47,407 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 20:06:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 371 proven. 388 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:06:48,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945621371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:48,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:48,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 101 [2021-12-18 20:06:48,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584823230] [2021-12-18 20:06:48,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:48,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-18 20:06:48,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-18 20:06:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=9297, Unknown=0, NotChecked=0, Total=10100 [2021-12-18 20:06:48,565 INFO L87 Difference]: Start difference. First operand 12555 states and 14641 transitions. Second operand has 101 states, 101 states have (on average 3.9504950495049505) internal successors, (399), 101 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:52,407 INFO L93 Difference]: Finished difference Result 15036 states and 17112 transitions. [2021-12-18 20:06:52,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-18 20:06:52,407 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.9504950495049505) internal successors, (399), 101 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-18 20:06:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:52,418 INFO L225 Difference]: With dead ends: 15036 [2021-12-18 20:06:52,419 INFO L226 Difference]: Without dead ends: 13724 [2021-12-18 20:06:52,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10230 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3489, Invalid=33183, Unknown=0, NotChecked=0, Total=36672 [2021-12-18 20:06:52,423 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 514 mSDsluCounter, 4281 mSDsCounter, 0 mSdLazyCounter, 2898 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 4381 SdHoareTripleChecker+Invalid, 3657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 704 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:52,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 4381 Invalid, 3657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2898 Invalid, 0 Unknown, 704 Unchecked, 0.7s Time] [2021-12-18 20:06:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13724 states. [2021-12-18 20:06:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13724 to 11408. [2021-12-18 20:06:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11408 states, 11406 states have (on average 1.1613186042433807) internal successors, (13246), 11407 states have internal predecessors, (13246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11408 states to 11408 states and 13246 transitions. [2021-12-18 20:06:52,543 INFO L78 Accepts]: Start accepts. Automaton has 11408 states and 13246 transitions. Word has length 141 [2021-12-18 20:06:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:52,543 INFO L470 AbstractCegarLoop]: Abstraction has 11408 states and 13246 transitions. [2021-12-18 20:06:52,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.9504950495049505) internal successors, (399), 101 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:52,544 INFO L276 IsEmpty]: Start isEmpty. Operand 11408 states and 13246 transitions. [2021-12-18 20:06:52,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-18 20:06:52,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:52,548 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:52,566 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 20:06:52,767 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,SelfDestructingSolverStorable74 [2021-12-18 20:06:52,767 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:06:52,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:52,767 INFO L85 PathProgramCache]: Analyzing trace with hash -334147048, now seen corresponding path program 25 times [2021-12-18 20:06:52,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:52,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333698335] [2021-12-18 20:06:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:52,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 276 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:06:53,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:53,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333698335] [2021-12-18 20:06:53,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333698335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:53,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873526465] [2021-12-18 20:06:53,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:06:53,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:53,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:53,375 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 20:06:53,376 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 20:06:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-18 20:06:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 325 proven. 536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:06:54,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:55,493 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 20:06:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 325 proven. 536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:06:55,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873526465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:55,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:55,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 73 [2021-12-18 20:06:55,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349848076] [2021-12-18 20:06:55,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:55,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-18 20:06:55,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:55,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-18 20:06:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=4937, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 20:06:55,613 INFO L87 Difference]: Start difference. First operand 11408 states and 13246 transitions. Second operand has 74 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 74 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 20:06:59,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:59,163 INFO L93 Difference]: Finished difference Result 14674 states and 16804 transitions. [2021-12-18 20:06:59,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-18 20:06:59,163 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 74 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 142 [2021-12-18 20:06:59,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:59,176 INFO L225 Difference]: With dead ends: 14674 [2021-12-18 20:06:59,176 INFO L226 Difference]: Without dead ends: 14674 [2021-12-18 20:06:59,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3417, Invalid=14139, Unknown=0, NotChecked=0, Total=17556 [2021-12-18 20:06:59,178 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 1356 mSDsluCounter, 3678 mSDsCounter, 0 mSdLazyCounter, 5128 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 3798 SdHoareTripleChecker+Invalid, 5253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 5128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:59,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 3798 Invalid, 5253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 5128 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-18 20:06:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14674 states. [2021-12-18 20:06:59,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14674 to 11553. [2021-12-18 20:06:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11553 states, 11551 states have (on average 1.1617176002077743) internal successors, (13419), 11552 states have internal predecessors, (13419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:06:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11553 states to 11553 states and 13419 transitions. [2021-12-18 20:06:59,313 INFO L78 Accepts]: Start accepts. Automaton has 11553 states and 13419 transitions. Word has length 142 [2021-12-18 20:06:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:59,313 INFO L470 AbstractCegarLoop]: Abstraction has 11553 states and 13419 transitions. [2021-12-18 20:06:59,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 74 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 20:06:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 11553 states and 13419 transitions. [2021-12-18 20:06:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-18 20:06:59,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:59,332 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 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 20:06:59,365 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 20:06:59,545 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,SelfDestructingSolverStorable75 [2021-12-18 20:06:59,545 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:06:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:59,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1944170630, now seen corresponding path program 4 times [2021-12-18 20:06:59,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:59,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728348732] [2021-12-18 20:06:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:59,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 20 proven. 559 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:06:59,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728348732] [2021-12-18 20:06:59,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728348732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025137903] [2021-12-18 20:06:59,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:06:59,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:59,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:59,937 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 20:06:59,938 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 20:07:00,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:07:00,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:00,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-18 20:07:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:00,174 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:07:00,174 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 20:07:00,978 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 20:07:01,037 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:07:01,038 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 20:07:01,057 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 8 treesize of output 3 [2021-12-18 20:07:24,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:07:24,302 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 18 treesize of output 7 [2021-12-18 20:07:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 315 proven. 270 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:07:24,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:25,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:25,871 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 20:07:25,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:25,878 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 20:07:25,881 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 20:07:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 312 proven. 273 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:07:27,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025137903] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:27,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:27,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 34, 34] total 89 [2021-12-18 20:07:27,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796305970] [2021-12-18 20:07:27,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:27,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-18 20:07:27,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-18 20:07:27,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=7232, Unknown=1, NotChecked=0, Total=7832 [2021-12-18 20:07:27,980 INFO L87 Difference]: Start difference. First operand 11553 states and 13419 transitions. Second operand has 89 states, 89 states have (on average 4.348314606741573) internal successors, (387), 89 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:34,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:34,455 INFO L93 Difference]: Finished difference Result 15020 states and 17350 transitions. [2021-12-18 20:07:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-12-18 20:07:34,455 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 4.348314606741573) internal successors, (387), 89 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-18 20:07:34,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:34,464 INFO L225 Difference]: With dead ends: 15020 [2021-12-18 20:07:34,465 INFO L226 Difference]: Without dead ends: 10689 [2021-12-18 20:07:34,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 241 SyntacticMatches, 10 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8271 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=2815, Invalid=32716, Unknown=1, NotChecked=0, Total=35532 [2021-12-18 20:07:34,466 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1645 mSDsluCounter, 3501 mSDsCounter, 0 mSdLazyCounter, 2986 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 4536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1187 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:34,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1645 Valid, 3594 Invalid, 4536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2986 Invalid, 0 Unknown, 1187 Unchecked, 1.0s Time] [2021-12-18 20:07:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-12-18 20:07:34,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 7086. [2021-12-18 20:07:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7086 states, 7084 states have (on average 1.1575381140598533) internal successors, (8200), 7085 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7086 states to 7086 states and 8200 transitions. [2021-12-18 20:07:34,539 INFO L78 Accepts]: Start accepts. Automaton has 7086 states and 8200 transitions. Word has length 142 [2021-12-18 20:07:34,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:34,539 INFO L470 AbstractCegarLoop]: Abstraction has 7086 states and 8200 transitions. [2021-12-18 20:07:34,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 4.348314606741573) internal successors, (387), 89 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7086 states and 8200 transitions. [2021-12-18 20:07:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-18 20:07:34,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:34,544 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:34,562 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 20:07:34,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:34,746 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:07:34,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:34,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1645258594, now seen corresponding path program 20 times [2021-12-18 20:07:34,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:34,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021129883] [2021-12-18 20:07:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:34,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:35,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:35,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021129883] [2021-12-18 20:07:35,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021129883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:35,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61868792] [2021-12-18 20:07:35,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:07:35,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:35,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:35,465 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 20:07:35,467 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 20:07:35,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:07:35,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:35,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 181 conjunts are in the unsatisfiable core [2021-12-18 20:07:35,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:35,689 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 20:07:36,434 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 20:07:36,502 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 20:07:38,473 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:07:38,474 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 20:07:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:38,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:39,105 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3069 (Array Int Int))) (let ((.cse0 (select v_ArrVal_3069 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= 0 .cse0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3069) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) .cse0))))) is different from false [2021-12-18 20:07:39,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:39,109 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 26 treesize of output 27 [2021-12-18 20:07:39,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:39,113 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 44 treesize of output 44 [2021-12-18 20:07:39,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:39,127 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 32 treesize of output 32 [2021-12-18 20:07:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 27 proven. 625 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:39,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61868792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:39,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:39,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 40] total 99 [2021-12-18 20:07:39,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463173825] [2021-12-18 20:07:39,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:39,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-18 20:07:39,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-18 20:07:39,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=9181, Unknown=1, NotChecked=192, Total=9702 [2021-12-18 20:07:39,879 INFO L87 Difference]: Start difference. First operand 7086 states and 8200 transitions. Second operand has 99 states, 99 states have (on average 3.5353535353535355) internal successors, (350), 99 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:41,732 INFO L93 Difference]: Finished difference Result 8174 states and 9404 transitions. [2021-12-18 20:07:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-18 20:07:41,732 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.5353535353535355) internal successors, (350), 99 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have 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 20:07:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:41,746 INFO L225 Difference]: With dead ends: 8174 [2021-12-18 20:07:41,746 INFO L226 Difference]: Without dead ends: 8083 [2021-12-18 20:07:41,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=524, Invalid=15735, Unknown=1, NotChecked=252, Total=16512 [2021-12-18 20:07:41,748 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 258 mSDsluCounter, 3746 mSDsCounter, 0 mSdLazyCounter, 2842 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 3819 SdHoareTripleChecker+Invalid, 3865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1007 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:41,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 3819 Invalid, 3865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2842 Invalid, 0 Unknown, 1007 Unchecked, 0.7s Time] [2021-12-18 20:07:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8083 states. [2021-12-18 20:07:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8083 to 8080. [2021-12-18 20:07:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8080 states, 8078 states have (on average 1.1525129982668978) internal successors, (9310), 8079 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8080 states to 8080 states and 9310 transitions. [2021-12-18 20:07:41,810 INFO L78 Accepts]: Start accepts. Automaton has 8080 states and 9310 transitions. Word has length 145 [2021-12-18 20:07:41,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:41,810 INFO L470 AbstractCegarLoop]: Abstraction has 8080 states and 9310 transitions. [2021-12-18 20:07:41,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.5353535353535355) internal successors, (350), 99 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:41,811 INFO L276 IsEmpty]: Start isEmpty. Operand 8080 states and 9310 transitions. [2021-12-18 20:07:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-18 20:07:41,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:41,815 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:41,844 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 20:07:42,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:42,045 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:07:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1879364889, now seen corresponding path program 26 times [2021-12-18 20:07:42,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:42,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998707631] [2021-12-18 20:07:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:42,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 44 proven. 889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:42,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:42,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998707631] [2021-12-18 20:07:42,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998707631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:42,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638505179] [2021-12-18 20:07:42,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:07:42,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:42,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:42,565 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 20:07:42,566 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 20:07:42,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:07:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:42,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 164 conjunts are in the unsatisfiable core [2021-12-18 20:07:42,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:42,798 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:07:42,798 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 20:07:43,731 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 20:07:45,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:45,998 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 20 treesize of output 20 [2021-12-18 20:07:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 325 proven. 608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:46,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:47,959 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 20:07:47,961 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 20:07:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 378 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:49,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638505179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:49,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:49,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 119 [2021-12-18 20:07:49,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054917159] [2021-12-18 20:07:49,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:49,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-18 20:07:49,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:49,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-18 20:07:49,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=13219, Unknown=0, NotChecked=0, Total=14042 [2021-12-18 20:07:49,979 INFO L87 Difference]: Start difference. First operand 8080 states and 9310 transitions. Second operand has 119 states, 119 states have (on average 3.638655462184874) internal successors, (433), 119 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:58,185 INFO L93 Difference]: Finished difference Result 11775 states and 13438 transitions. [2021-12-18 20:07:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-18 20:07:58,185 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.638655462184874) internal successors, (433), 119 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-12-18 20:07:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:58,193 INFO L225 Difference]: With dead ends: 11775 [2021-12-18 20:07:58,194 INFO L226 Difference]: Without dead ends: 11655 [2021-12-18 20:07:58,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9743 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=2867, Invalid=41865, Unknown=0, NotChecked=0, Total=44732 [2021-12-18 20:07:58,196 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 2012 mSDsluCounter, 9272 mSDsCounter, 0 mSdLazyCounter, 7607 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2012 SdHoareTripleChecker+Valid, 9470 SdHoareTripleChecker+Invalid, 10314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 7607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2589 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:58,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2012 Valid, 9470 Invalid, 10314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 7607 Invalid, 0 Unknown, 2589 Unchecked, 2.5s Time] [2021-12-18 20:07:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11655 states. [2021-12-18 20:07:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11655 to 8981. [2021-12-18 20:07:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8981 states, 8979 states have (on average 1.1541374317852768) internal successors, (10363), 8980 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8981 states to 8981 states and 10363 transitions. [2021-12-18 20:07:58,287 INFO L78 Accepts]: Start accepts. Automaton has 8981 states and 10363 transitions. Word has length 147 [2021-12-18 20:07:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:58,287 INFO L470 AbstractCegarLoop]: Abstraction has 8981 states and 10363 transitions. [2021-12-18 20:07:58,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.638655462184874) internal successors, (433), 119 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8981 states and 10363 transitions. [2021-12-18 20:07:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-18 20:07:58,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:58,307 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:58,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-18 20:07:58,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-18 20:07:58,524 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:07:58,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:58,524 INFO L85 PathProgramCache]: Analyzing trace with hash 93682465, now seen corresponding path program 21 times [2021-12-18 20:07:58,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:58,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269502561] [2021-12-18 20:07:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:58,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 153 proven. 540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:58,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:58,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269502561] [2021-12-18 20:07:58,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269502561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:58,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772410875] [2021-12-18 20:07:58,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:07:58,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:58,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:58,985 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 20:07:58,985 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 20:07:59,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-18 20:07:59,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:59,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-18 20:07:59,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:59,414 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:07:59,414 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 20:08:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 190 proven. 503 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:00,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 231 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:01,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772410875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:01,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:01,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 70 [2021-12-18 20:08:01,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883161150] [2021-12-18 20:08:01,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:01,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-18 20:08:01,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:01,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-18 20:08:01,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=4308, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 20:08:01,970 INFO L87 Difference]: Start difference. First operand 8981 states and 10363 transitions. Second operand has 71 states, 70 states have (on average 5.571428571428571) internal successors, (390), 71 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:04,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:04,703 INFO L93 Difference]: Finished difference Result 18510 states and 21475 transitions. [2021-12-18 20:08:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-18 20:08:04,704 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 5.571428571428571) internal successors, (390), 71 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-18 20:08:04,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:04,720 INFO L225 Difference]: With dead ends: 18510 [2021-12-18 20:08:04,720 INFO L226 Difference]: Without dead ends: 18510 [2021-12-18 20:08:04,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 253 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2785, Invalid=11257, Unknown=0, NotChecked=0, Total=14042 [2021-12-18 20:08:04,722 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 1045 mSDsluCounter, 2450 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 2605 SdHoareTripleChecker+Invalid, 2444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:04,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 2605 Invalid, 2444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 20:08:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18510 states. [2021-12-18 20:08:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18510 to 9546. [2021-12-18 20:08:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9546 states, 9544 states have (on average 1.1550712489522212) internal successors, (11024), 9545 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9546 states to 9546 states and 11024 transitions. [2021-12-18 20:08:04,833 INFO L78 Accepts]: Start accepts. Automaton has 9546 states and 11024 transitions. Word has length 149 [2021-12-18 20:08:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:04,834 INFO L470 AbstractCegarLoop]: Abstraction has 9546 states and 11024 transitions. [2021-12-18 20:08:04,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 5.571428571428571) internal successors, (390), 71 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 9546 states and 11024 transitions. [2021-12-18 20:08:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-18 20:08:04,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:04,839 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 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 20:08:04,857 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 20:08:05,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-18 20:08:05,055 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:08:05,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash -715377976, now seen corresponding path program 5 times [2021-12-18 20:08:05,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:05,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252780527] [2021-12-18 20:08:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:05,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 27 proven. 680 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:08:05,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:05,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252780527] [2021-12-18 20:08:05,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252780527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:05,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821537780] [2021-12-18 20:08:05,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:08:05,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:05,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:05,924 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 20:08:05,959 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 20:08:06,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-18 20:08:06,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:06,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 200 conjunts are in the unsatisfiable core [2021-12-18 20:08:06,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:06,935 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 20:08:06,994 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:08:06,994 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 20:08:06,999 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 8 treesize of output 3 [2021-12-18 20:08:07,480 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 20:08:09,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:08:09,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:08:09,911 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 20:08:09,912 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 44 treesize of output 25 [2021-12-18 20:08:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 685 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:08:09,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:10,503 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 20:08:10,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:10,909 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 50 treesize of output 39 [2021-12-18 20:08:10,921 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-12-18 20:08:10,922 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 69 treesize of output 68 [2021-12-18 20:08:10,966 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-12-18 20:08:10,966 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 53 treesize of output 55 [2021-12-18 20:08:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 27 proven. 680 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:08:12,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821537780] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:12,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:12,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 47, 45] total 117 [2021-12-18 20:08:12,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169904271] [2021-12-18 20:08:12,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:12,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-12-18 20:08:12,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:12,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-12-18 20:08:12,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=13153, Unknown=10, NotChecked=0, Total=13572 [2021-12-18 20:08:12,088 INFO L87 Difference]: Start difference. First operand 9546 states and 11024 transitions. Second operand has 117 states, 117 states have (on average 3.1196581196581197) internal successors, (365), 117 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:13,378 INFO L93 Difference]: Finished difference Result 11577 states and 13310 transitions. [2021-12-18 20:08:13,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-18 20:08:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.1196581196581197) internal successors, (365), 117 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-12-18 20:08:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:13,388 INFO L225 Difference]: With dead ends: 11577 [2021-12-18 20:08:13,388 INFO L226 Difference]: Without dead ends: 11577 [2021-12-18 20:08:13,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4033 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=487, Invalid=15759, Unknown=10, NotChecked=0, Total=16256 [2021-12-18 20:08:13,389 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 194 mSDsluCounter, 5082 mSDsCounter, 0 mSdLazyCounter, 3491 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 5156 SdHoareTripleChecker+Invalid, 4061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:13,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 5156 Invalid, 4061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3491 Invalid, 0 Unknown, 557 Unchecked, 0.9s Time] [2021-12-18 20:08:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11577 states. [2021-12-18 20:08:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11577 to 9953. [2021-12-18 20:08:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9953 states, 9951 states have (on average 1.1560647171138578) internal successors, (11504), 9952 states have internal predecessors, (11504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9953 states to 9953 states and 11504 transitions. [2021-12-18 20:08:13,463 INFO L78 Accepts]: Start accepts. Automaton has 9953 states and 11504 transitions. Word has length 154 [2021-12-18 20:08:13,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:13,464 INFO L470 AbstractCegarLoop]: Abstraction has 9953 states and 11504 transitions. [2021-12-18 20:08:13,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.1196581196581197) internal successors, (365), 117 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand 9953 states and 11504 transitions. [2021-12-18 20:08:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-18 20:08:13,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:13,470 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 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 20:08:13,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-18 20:08:13,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:13,688 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:08:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:13,689 INFO L85 PathProgramCache]: Analyzing trace with hash -927543150, now seen corresponding path program 6 times [2021-12-18 20:08:13,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:13,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728242654] [2021-12-18 20:08:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:13,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 680 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-18 20:08:14,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:14,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728242654] [2021-12-18 20:08:14,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728242654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:14,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114429419] [2021-12-18 20:08:14,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:08:14,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:14,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:14,286 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 20:08:14,287 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 20:08:14,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-18 20:08:14,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:14,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 146 conjunts are in the unsatisfiable core [2021-12-18 20:08:14,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:14,715 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:08:14,715 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 20:08:15,744 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 20:08:15,823 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:08:15,823 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 20:08:15,838 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 8 treesize of output 3 [2021-12-18 20:08:19,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:08:19,718 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 22 treesize of output 11 [2021-12-18 20:08:19,726 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:08:19,726 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 11 treesize of output 11 [2021-12-18 20:08:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 686 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 20:08:19,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:20,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:20,907 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 20:08:20,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:20,912 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 20:08:20,914 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 20:08:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 686 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 20:08:22,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114429419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:22,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:22,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36, 36] total 104 [2021-12-18 20:08:22,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755824990] [2021-12-18 20:08:22,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:22,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-18 20:08:22,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:22,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-18 20:08:22,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=10410, Unknown=1, NotChecked=0, Total=10712 [2021-12-18 20:08:22,798 INFO L87 Difference]: Start difference. First operand 9953 states and 11504 transitions. Second operand has 104 states, 104 states have (on average 4.125) internal successors, (429), 104 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:27,750 INFO L93 Difference]: Finished difference Result 20096 states and 23265 transitions. [2021-12-18 20:08:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-18 20:08:27,750 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.125) internal successors, (429), 104 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-12-18 20:08:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:27,768 INFO L225 Difference]: With dead ends: 20096 [2021-12-18 20:08:27,768 INFO L226 Difference]: Without dead ends: 20096 [2021-12-18 20:08:27,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4495 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=795, Invalid=28616, Unknown=1, NotChecked=0, Total=29412 [2021-12-18 20:08:27,770 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 404 mSDsluCounter, 4587 mSDsCounter, 0 mSdLazyCounter, 5103 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 4658 SdHoareTripleChecker+Invalid, 7533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2416 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:27,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 4658 Invalid, 7533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 5103 Invalid, 0 Unknown, 2416 Unchecked, 1.5s Time] [2021-12-18 20:08:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20096 states. [2021-12-18 20:08:27,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20096 to 13661. [2021-12-18 20:08:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13661 states, 13659 states have (on average 1.1624569880664763) internal successors, (15878), 13660 states have internal predecessors, (15878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13661 states to 13661 states and 15878 transitions. [2021-12-18 20:08:27,898 INFO L78 Accepts]: Start accepts. Automaton has 13661 states and 15878 transitions. Word has length 154 [2021-12-18 20:08:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:27,898 INFO L470 AbstractCegarLoop]: Abstraction has 13661 states and 15878 transitions. [2021-12-18 20:08:27,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.125) internal successors, (429), 104 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 13661 states and 15878 transitions. [2021-12-18 20:08:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-18 20:08:27,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:27,905 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 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 20:08:27,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:28,117 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,SelfDestructingSolverStorable81 [2021-12-18 20:08:28,117 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:08:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:28,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1491861844, now seen corresponding path program 7 times [2021-12-18 20:08:28,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:28,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809628836] [2021-12-18 20:08:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:28,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 681 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:08:28,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:28,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809628836] [2021-12-18 20:08:28,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809628836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:28,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472445492] [2021-12-18 20:08:28,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:08:28,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:28,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:28,673 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 20:08:28,674 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 20:08:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:28,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-18 20:08:28,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:28,940 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 20:08:29,326 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 20:08:29,371 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 20:08:29,563 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 20:08:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 23 proven. 680 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:08:29,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:29,812 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3426) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0)) is different from false [2021-12-18 20:08:29,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:29,815 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 20:08:29,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:29,819 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 20:08:29,821 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 20:08:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 681 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:08:30,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472445492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:30,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:30,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 54 [2021-12-18 20:08:30,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083982074] [2021-12-18 20:08:30,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:30,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-18 20:08:30,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:30,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-18 20:08:30,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2613, Unknown=1, NotChecked=102, Total=2862 [2021-12-18 20:08:30,068 INFO L87 Difference]: Start difference. First operand 13661 states and 15878 transitions. Second operand has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 54 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 20:08:32,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:32,253 INFO L93 Difference]: Finished difference Result 14126 states and 16324 transitions. [2021-12-18 20:08:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-18 20:08:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 54 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 154 [2021-12-18 20:08:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:32,261 INFO L225 Difference]: With dead ends: 14126 [2021-12-18 20:08:32,262 INFO L226 Difference]: Without dead ends: 9549 [2021-12-18 20:08:32,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 282 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=433, Invalid=7760, Unknown=1, NotChecked=178, Total=8372 [2021-12-18 20:08:32,263 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 274 mSDsluCounter, 6300 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 6469 SdHoareTripleChecker+Invalid, 4853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:32,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 6469 Invalid, 4853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4516 Invalid, 0 Unknown, 309 Unchecked, 1.2s Time] [2021-12-18 20:08:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9549 states. [2021-12-18 20:08:32,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 8705. [2021-12-18 20:08:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8705 states, 8703 states have (on average 1.1589107204412272) internal successors, (10086), 8704 states have internal predecessors, (10086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 10086 transitions. [2021-12-18 20:08:32,326 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 10086 transitions. Word has length 154 [2021-12-18 20:08:32,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:32,327 INFO L470 AbstractCegarLoop]: Abstraction has 8705 states and 10086 transitions. [2021-12-18 20:08:32,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 54 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 20:08:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 10086 transitions. [2021-12-18 20:08:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-18 20:08:32,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:32,331 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:32,349 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 20:08:32,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:32,548 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:08:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash 251896469, now seen corresponding path program 27 times [2021-12-18 20:08:32,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:32,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445248677] [2021-12-18 20:08:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:32,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:33,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:33,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445248677] [2021-12-18 20:08:33,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445248677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:33,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144891161] [2021-12-18 20:08:33,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:08:33,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:33,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:33,176 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 20:08:33,231 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 20:08:33,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-18 20:08:33,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:33,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 180 conjunts are in the unsatisfiable core [2021-12-18 20:08:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:34,241 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 20:08:34,584 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 20:08:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:34,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:34,846 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 20:08:34,848 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 20:08:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:35,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144891161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:35,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:35,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 69 [2021-12-18 20:08:35,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086411397] [2021-12-18 20:08:35,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:35,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 20:08:35,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:35,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 20:08:35,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4493, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 20:08:35,044 INFO L87 Difference]: Start difference. First operand 8705 states and 10086 transitions. Second operand has 69 states, 69 states have (on average 3.463768115942029) internal successors, (239), 69 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:38,240 INFO L93 Difference]: Finished difference Result 14795 states and 17136 transitions. [2021-12-18 20:08:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-18 20:08:38,241 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.463768115942029) internal successors, (239), 69 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have 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 20:08:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:38,254 INFO L225 Difference]: With dead ends: 14795 [2021-12-18 20:08:38,254 INFO L226 Difference]: Without dead ends: 14666 [2021-12-18 20:08:38,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 282 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=616, Invalid=10940, Unknown=0, NotChecked=0, Total=11556 [2021-12-18 20:08:38,256 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 676 mSDsluCounter, 10478 mSDsCounter, 0 mSdLazyCounter, 7993 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 10753 SdHoareTripleChecker+Invalid, 8582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 7993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 542 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:38,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 10753 Invalid, 8582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 7993 Invalid, 0 Unknown, 542 Unchecked, 2.0s Time] [2021-12-18 20:08:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14666 states. [2021-12-18 20:08:38,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14666 to 8874. [2021-12-18 20:08:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8874 states, 8872 states have (on average 1.1583633904418396) internal successors, (10277), 8873 states have internal predecessors, (10277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8874 states to 8874 states and 10277 transitions. [2021-12-18 20:08:38,380 INFO L78 Accepts]: Start accepts. Automaton has 8874 states and 10277 transitions. Word has length 156 [2021-12-18 20:08:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:38,380 INFO L470 AbstractCegarLoop]: Abstraction has 8874 states and 10277 transitions. [2021-12-18 20:08:38,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.463768115942029) internal successors, (239), 69 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8874 states and 10277 transitions. [2021-12-18 20:08:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-18 20:08:38,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:38,384 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 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] [2021-12-18 20:08:38,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-12-18 20:08:38,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:38,587 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:08:38,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1458914348, now seen corresponding path program 22 times [2021-12-18 20:08:38,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:38,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745132396] [2021-12-18 20:08:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:38,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 24 proven. 759 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:39,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:39,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745132396] [2021-12-18 20:08:39,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745132396] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:39,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854896609] [2021-12-18 20:08:39,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:08:39,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:39,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:39,496 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 20:08:39,498 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 20:08:39,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:08:39,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-18 20:08:39,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:39,778 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:08:39,779 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 20:08:40,980 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 20:08:41,049 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:08:41,050 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 20:08:41,067 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 8 treesize of output 3 [2021-12-18 20:09:05,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:09:05,412 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 18 treesize of output 7 [2021-12-18 20:09:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 469 proven. 314 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:09:05,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:07,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:09:07,600 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 20:09:07,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:09:07,606 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 20:09:07,609 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 20:09:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 470 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:09:10,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854896609] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:10,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:10,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 37, 37] total 108 [2021-12-18 20:09:10,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895378716] [2021-12-18 20:09:10,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:10,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-18 20:09:10,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:10,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-18 20:09:10,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=762, Invalid=10792, Unknown=2, NotChecked=0, Total=11556 [2021-12-18 20:09:10,211 INFO L87 Difference]: Start difference. First operand 8874 states and 10277 transitions. Second operand has 108 states, 108 states have (on average 4.203703703703703) internal successors, (454), 108 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 20:09:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:23,847 INFO L93 Difference]: Finished difference Result 23972 states and 27900 transitions. [2021-12-18 20:09:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-18 20:09:23,847 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 4.203703703703703) internal successors, (454), 108 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 157 [2021-12-18 20:09:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:23,868 INFO L225 Difference]: With dead ends: 23972 [2021-12-18 20:09:23,869 INFO L226 Difference]: Without dead ends: 23873 [2021-12-18 20:09:23,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 273 SyntacticMatches, 8 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13262 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=3591, Invalid=52338, Unknown=3, NotChecked=0, Total=55932 [2021-12-18 20:09:23,872 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1493 mSDsluCounter, 4547 mSDsCounter, 0 mSdLazyCounter, 4552 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 4642 SdHoareTripleChecker+Invalid, 6194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 4552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1435 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:23,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 4642 Invalid, 6194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 4552 Invalid, 0 Unknown, 1435 Unchecked, 1.7s Time] [2021-12-18 20:09:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23873 states. [2021-12-18 20:09:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23873 to 15002. [2021-12-18 20:09:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15002 states, 15000 states have (on average 1.1629333333333334) internal successors, (17444), 15001 states have internal predecessors, (17444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:24,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15002 states to 15002 states and 17444 transitions. [2021-12-18 20:09:24,040 INFO L78 Accepts]: Start accepts. Automaton has 15002 states and 17444 transitions. Word has length 157 [2021-12-18 20:09:24,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:24,041 INFO L470 AbstractCegarLoop]: Abstraction has 15002 states and 17444 transitions. [2021-12-18 20:09:24,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 4.203703703703703) internal successors, (454), 108 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 20:09:24,041 INFO L276 IsEmpty]: Start isEmpty. Operand 15002 states and 17444 transitions. [2021-12-18 20:09:24,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-18 20:09:24,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:24,048 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:24,067 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 20:09:24,266 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,SelfDestructingSolverStorable84 [2021-12-18 20:09:24,267 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:09:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:24,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1757384535, now seen corresponding path program 11 times [2021-12-18 20:09:24,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:24,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627357255] [2021-12-18 20:09:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:24,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 47 proven. 963 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:09:24,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:24,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627357255] [2021-12-18 20:09:24,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627357255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:24,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382634293] [2021-12-18 20:09:24,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:09:24,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:24,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:24,853 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 20:09:24,854 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 20:09:25,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-18 20:09:25,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 170 conjunts are in the unsatisfiable core [2021-12-18 20:09:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:25,660 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 20:09:26,010 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 7 [2021-12-18 20:09:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 47 proven. 963 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:09:26,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:26,216 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 20:09:26,217 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 20:09:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 47 proven. 963 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:09:26,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382634293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:26,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:26,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 66 [2021-12-18 20:09:26,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36155021] [2021-12-18 20:09:26,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:26,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-18 20:09:26,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-18 20:09:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 20:09:26,415 INFO L87 Difference]: Start difference. First operand 15002 states and 17444 transitions. Second operand has 66 states, 66 states have (on average 3.8181818181818183) internal successors, (252), 66 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 20:09:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:29,497 INFO L93 Difference]: Finished difference Result 21867 states and 25199 transitions. [2021-12-18 20:09:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-18 20:09:29,498 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.8181818181818183) internal successors, (252), 66 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 159 [2021-12-18 20:09:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:29,514 INFO L225 Difference]: With dead ends: 21867 [2021-12-18 20:09:29,514 INFO L226 Difference]: Without dead ends: 19859 [2021-12-18 20:09:29,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 289 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=733, Invalid=9773, Unknown=0, NotChecked=0, Total=10506 [2021-12-18 20:09:29,515 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 970 mSDsluCounter, 9257 mSDsCounter, 0 mSdLazyCounter, 7461 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 9512 SdHoareTripleChecker+Invalid, 7808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 7461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:29,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 9512 Invalid, 7808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 7461 Invalid, 0 Unknown, 239 Unchecked, 1.9s Time] [2021-12-18 20:09:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19859 states. [2021-12-18 20:09:29,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19859 to 16692. [2021-12-18 20:09:29,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16692 states, 16690 states have (on average 1.1645895745955661) internal successors, (19437), 16691 states have internal predecessors, (19437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16692 states to 16692 states and 19437 transitions. [2021-12-18 20:09:29,690 INFO L78 Accepts]: Start accepts. Automaton has 16692 states and 19437 transitions. Word has length 159 [2021-12-18 20:09:29,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:29,691 INFO L470 AbstractCegarLoop]: Abstraction has 16692 states and 19437 transitions. [2021-12-18 20:09:29,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.8181818181818183) internal successors, (252), 66 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 20:09:29,691 INFO L276 IsEmpty]: Start isEmpty. Operand 16692 states and 19437 transitions. [2021-12-18 20:09:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-18 20:09:29,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:29,698 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:29,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-18 20:09:29,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:29,911 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:09:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1284113394, now seen corresponding path program 28 times [2021-12-18 20:09:29,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:29,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168050034] [2021-12-18 20:09:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:29,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 378 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:09:30,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:30,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168050034] [2021-12-18 20:09:30,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168050034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:30,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833475860] [2021-12-18 20:09:30,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:09:30,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:30,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:30,595 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 20:09:30,596 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 20:09:30,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:09:30,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:30,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 177 conjunts are in the unsatisfiable core [2021-12-18 20:09:30,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:30,880 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:09:30,881 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 20:09:31,312 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 20:09:32,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:09:32,374 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 21 treesize of output 21 [2021-12-18 20:09:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 450 proven. 678 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:09:32,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:34,304 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 20:09:34,306 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 20:09:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 496 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:09:36,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833475860] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:36,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:36,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 43, 43] total 108 [2021-12-18 20:09:36,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364701124] [2021-12-18 20:09:36,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:36,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-18 20:09:36,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:36,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-18 20:09:36,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=10636, Unknown=0, NotChecked=0, Total=11772 [2021-12-18 20:09:36,991 INFO L87 Difference]: Start difference. First operand 16692 states and 19437 transitions. Second operand has 109 states, 108 states have (on average 3.8333333333333335) internal successors, (414), 109 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:45,586 INFO L93 Difference]: Finished difference Result 23497 states and 27207 transitions. [2021-12-18 20:09:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-18 20:09:45,586 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 3.8333333333333335) internal successors, (414), 109 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have 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 20:09:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:45,603 INFO L225 Difference]: With dead ends: 23497 [2021-12-18 20:09:45,603 INFO L226 Difference]: Without dead ends: 23497 [2021-12-18 20:09:45,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 252 SyntacticMatches, 4 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7494 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=8128, Invalid=37454, Unknown=0, NotChecked=0, Total=45582 [2021-12-18 20:09:45,606 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 1507 mSDsluCounter, 5724 mSDsCounter, 0 mSdLazyCounter, 6722 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 5914 SdHoareTripleChecker+Invalid, 7667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 6722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 699 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:45,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 5914 Invalid, 7667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 6722 Invalid, 0 Unknown, 699 Unchecked, 2.5s Time] [2021-12-18 20:09:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23497 states. [2021-12-18 20:09:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23497 to 16822. [2021-12-18 20:09:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16822 states, 16820 states have (on average 1.16474435196195) internal successors, (19591), 16821 states have internal predecessors, (19591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16822 states to 16822 states and 19591 transitions. [2021-12-18 20:09:45,758 INFO L78 Accepts]: Start accepts. Automaton has 16822 states and 19591 transitions. Word has length 160 [2021-12-18 20:09:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:45,758 INFO L470 AbstractCegarLoop]: Abstraction has 16822 states and 19591 transitions. [2021-12-18 20:09:45,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 3.8333333333333335) internal successors, (414), 109 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 16822 states and 19591 transitions. [2021-12-18 20:09:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-18 20:09:45,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:45,765 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 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] [2021-12-18 20:09:45,782 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 20:09:45,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:45,983 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:09:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash -377177553, now seen corresponding path program 23 times [2021-12-18 20:09:45,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:45,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829539201] [2021-12-18 20:09:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:45,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 190 proven. 638 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:46,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:46,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829539201] [2021-12-18 20:09:46,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829539201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:46,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745902672] [2021-12-18 20:09:46,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:09:46,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:46,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:46,491 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 20:09:46,492 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 20:09:46,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-18 20:09:46,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:46,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 142 conjunts are in the unsatisfiable core [2021-12-18 20:09:46,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:46,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:09:46,853 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 20:09:46,856 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 20:09:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 231 proven. 597 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:48,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 276 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:49,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745902672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:49,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:49,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 82 [2021-12-18 20:09:49,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54234966] [2021-12-18 20:09:49,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:49,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-18 20:09:49,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:49,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-18 20:09:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=6089, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 20:09:49,679 INFO L87 Difference]: Start difference. First operand 16822 states and 19591 transitions. Second operand has 83 states, 82 states have (on average 5.7682926829268295) internal successors, (473), 83 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:51,948 INFO L93 Difference]: Finished difference Result 21802 states and 25373 transitions. [2021-12-18 20:09:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-18 20:09:51,948 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 5.7682926829268295) internal successors, (473), 83 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-18 20:09:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:51,965 INFO L225 Difference]: With dead ends: 21802 [2021-12-18 20:09:51,965 INFO L226 Difference]: Without dead ends: 21802 [2021-12-18 20:09:51,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3342, Invalid=14748, Unknown=0, NotChecked=0, Total=18090 [2021-12-18 20:09:51,967 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 900 mSDsluCounter, 3473 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 3632 SdHoareTripleChecker+Invalid, 3347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:51,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 3632 Invalid, 3347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 20:09:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21802 states. [2021-12-18 20:09:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21802 to 17395. [2021-12-18 20:09:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17395 states, 17393 states have (on average 1.1648939228425228) internal successors, (20261), 17394 states have internal predecessors, (20261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17395 states to 17395 states and 20261 transitions. [2021-12-18 20:09:52,142 INFO L78 Accepts]: Start accepts. Automaton has 17395 states and 20261 transitions. Word has length 161 [2021-12-18 20:09:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:52,143 INFO L470 AbstractCegarLoop]: Abstraction has 17395 states and 20261 transitions. [2021-12-18 20:09:52,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 5.7682926829268295) internal successors, (473), 83 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 17395 states and 20261 transitions. [2021-12-18 20:09:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-18 20:09:52,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:52,149 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:52,168 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 20:09:52,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:52,363 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:09:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1026030292, now seen corresponding path program 12 times [2021-12-18 20:09:52,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:52,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073701661] [2021-12-18 20:09:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:52,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 325 proven. 742 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:09:52,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073701661] [2021-12-18 20:09:52,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073701661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363435915] [2021-12-18 20:09:52,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:09:52,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:52,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:52,987 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 20:09:52,988 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 20:09:53,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-18 20:09:53,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:53,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-18 20:09:53,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:53,716 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:09:53,716 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 20:09:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 378 proven. 689 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:09:55,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 435 proven. 632 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:09:57,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363435915] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:57,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:57,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 109 [2021-12-18 20:09:57,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968753398] [2021-12-18 20:09:57,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:57,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-18 20:09:57,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-18 20:09:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=10664, Unknown=0, NotChecked=0, Total=11990 [2021-12-18 20:09:57,115 INFO L87 Difference]: Start difference. First operand 17395 states and 20261 transitions. Second operand has 110 states, 109 states have (on average 4.3577981651376145) internal successors, (475), 110 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:02,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:02,799 INFO L93 Difference]: Finished difference Result 22244 states and 25615 transitions. [2021-12-18 20:10:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-18 20:10:02,800 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 4.3577981651376145) internal successors, (475), 110 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have 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 20:10:02,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:02,815 INFO L225 Difference]: With dead ends: 22244 [2021-12-18 20:10:02,815 INFO L226 Difference]: Without dead ends: 22244 [2021-12-18 20:10:02,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6746 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7103, Invalid=27307, Unknown=0, NotChecked=0, Total=34410 [2021-12-18 20:10:02,817 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 1451 mSDsluCounter, 3128 mSDsCounter, 0 mSdLazyCounter, 4177 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 3253 SdHoareTripleChecker+Invalid, 4280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 4177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:02,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1451 Valid, 3253 Invalid, 4280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 4177 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-18 20:10:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22244 states. [2021-12-18 20:10:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22244 to 17510. [2021-12-18 20:10:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17510 states, 17508 states have (on average 1.1651245145076536) internal successors, (20399), 17509 states have internal predecessors, (20399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17510 states to 17510 states and 20399 transitions. [2021-12-18 20:10:02,956 INFO L78 Accepts]: Start accepts. Automaton has 17510 states and 20399 transitions. Word has length 163 [2021-12-18 20:10:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:02,956 INFO L470 AbstractCegarLoop]: Abstraction has 17510 states and 20399 transitions. [2021-12-18 20:10:02,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 4.3577981651376145) internal successors, (475), 110 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 17510 states and 20399 transitions. [2021-12-18 20:10:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-18 20:10:02,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:02,963 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:02,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:03,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-12-18 20:10:03,182 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:10:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1973893214, now seen corresponding path program 8 times [2021-12-18 20:10:03,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:03,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293943253] [2021-12-18 20:10:03,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:03,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 24 proven. 815 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:10:03,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:03,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293943253] [2021-12-18 20:10:03,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293943253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:03,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450585265] [2021-12-18 20:10:03,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:10:03,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:03,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:03,835 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 20:10:03,836 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 20:10:04,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:10:04,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:10:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 151 conjunts are in the unsatisfiable core [2021-12-18 20:10:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:04,138 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 20:10:04,713 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 20:10:04,763 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 17 treesize of output 19 [2021-12-18 20:10:05,036 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 20:10:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 25 proven. 814 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:10:05,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:05,314 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3976 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3976) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 11)) 0)) is different from false [2021-12-18 20:10:05,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:10:05,317 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 20:10:05,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:10:05,322 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 20:10:05,323 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 20:10:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 24 proven. 815 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:10:05,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450585265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:05,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:05,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 57 [2021-12-18 20:10:05,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555339613] [2021-12-18 20:10:05,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:05,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 20:10:05,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:05,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 20:10:05,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2930, Unknown=1, NotChecked=108, Total=3192 [2021-12-18 20:10:05,582 INFO L87 Difference]: Start difference. First operand 17510 states and 20399 transitions. Second operand has 57 states, 57 states have (on average 3.982456140350877) internal successors, (227), 57 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:07,868 INFO L93 Difference]: Finished difference Result 17545 states and 20315 transitions. [2021-12-18 20:10:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-18 20:10:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.982456140350877) internal successors, (227), 57 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-18 20:10:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:07,877 INFO L225 Difference]: With dead ends: 17545 [2021-12-18 20:10:07,878 INFO L226 Difference]: Without dead ends: 11677 [2021-12-18 20:10:07,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 305 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=291, Invalid=6354, Unknown=1, NotChecked=160, Total=6806 [2021-12-18 20:10:07,878 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 218 mSDsluCounter, 6743 mSDsCounter, 0 mSdLazyCounter, 4708 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 6929 SdHoareTripleChecker+Invalid, 5149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:07,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 6929 Invalid, 5149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4708 Invalid, 0 Unknown, 425 Unchecked, 1.5s Time] [2021-12-18 20:10:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11677 states. [2021-12-18 20:10:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11677 to 10694. [2021-12-18 20:10:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10694 states, 10692 states have (on average 1.1607744107744107) internal successors, (12411), 10693 states have internal predecessors, (12411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10694 states to 10694 states and 12411 transitions. [2021-12-18 20:10:07,958 INFO L78 Accepts]: Start accepts. Automaton has 10694 states and 12411 transitions. Word has length 166 [2021-12-18 20:10:07,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:07,958 INFO L470 AbstractCegarLoop]: Abstraction has 10694 states and 12411 transitions. [2021-12-18 20:10:07,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.982456140350877) internal successors, (227), 57 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:07,959 INFO L276 IsEmpty]: Start isEmpty. Operand 10694 states and 12411 transitions. [2021-12-18 20:10:07,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-18 20:10:07,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:07,963 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:07,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:08,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:08,179 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:10:08,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash 404418181, now seen corresponding path program 13 times [2021-12-18 20:10:08,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:08,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472966860] [2021-12-18 20:10:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:08,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 50 proven. 1099 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:10:08,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:08,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472966860] [2021-12-18 20:10:08,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472966860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:08,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330895107] [2021-12-18 20:10:08,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:10:08,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:08,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:08,832 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 20:10:08,833 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 20:10:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:09,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 180 conjunts are in the unsatisfiable core [2021-12-18 20:10:09,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:09,669 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 20:10:10,008 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 20:10:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 50 proven. 1099 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:10:10,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:10,306 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 20:10:10,307 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 26 treesize of output 22 [2021-12-18 20:10:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 50 proven. 1099 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:10:10,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330895107] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:10,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:10,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 69 [2021-12-18 20:10:10,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594104963] [2021-12-18 20:10:10,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:10,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 20:10:10,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:10,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 20:10:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4493, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 20:10:10,548 INFO L87 Difference]: Start difference. First operand 10694 states and 12411 transitions. Second operand has 69 states, 69 states have (on average 3.8405797101449277) internal successors, (265), 69 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:14,562 INFO L93 Difference]: Finished difference Result 14854 states and 17046 transitions. [2021-12-18 20:10:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-18 20:10:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.8405797101449277) internal successors, (265), 69 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-12-18 20:10:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:14,573 INFO L225 Difference]: With dead ends: 14854 [2021-12-18 20:10:14,574 INFO L226 Difference]: Without dead ends: 12551 [2021-12-18 20:10:14,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 306 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=768, Invalid=10788, Unknown=0, NotChecked=0, Total=11556 [2021-12-18 20:10:14,575 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 1101 mSDsluCounter, 10662 mSDsCounter, 0 mSdLazyCounter, 8837 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 10935 SdHoareTripleChecker+Invalid, 9079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 8837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:14,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1101 Valid, 10935 Invalid, 9079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 8837 Invalid, 0 Unknown, 111 Unchecked, 2.6s Time] [2021-12-18 20:10:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12551 states. [2021-12-18 20:10:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12551 to 10741. [2021-12-18 20:10:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10741 states, 10739 states have (on average 1.1604432442499302) internal successors, (12462), 10740 states have internal predecessors, (12462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10741 states to 10741 states and 12462 transitions. [2021-12-18 20:10:14,661 INFO L78 Accepts]: Start accepts. Automaton has 10741 states and 12462 transitions. Word has length 168 [2021-12-18 20:10:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:14,661 INFO L470 AbstractCegarLoop]: Abstraction has 10741 states and 12462 transitions. [2021-12-18 20:10:14,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.8405797101449277) internal successors, (265), 69 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 10741 states and 12462 transitions. [2021-12-18 20:10:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-18 20:10:14,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:14,666 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 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] [2021-12-18 20:10:14,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:14,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:14,875 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:10:14,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash -822897350, now seen corresponding path program 24 times [2021-12-18 20:10:14,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:14,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470155996] [2021-12-18 20:10:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:14,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 26 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:15,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:15,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470155996] [2021-12-18 20:10:15,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470155996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:15,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749925364] [2021-12-18 20:10:15,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:10:15,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:15,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:15,707 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 20:10:15,712 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 20:10:16,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-18 20:10:16,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:10:16,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 203 conjunts are in the unsatisfiable core [2021-12-18 20:10:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:16,186 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 20:10:17,029 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 20:10:17,084 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 20:10:19,340 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:10:19,341 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 20:10:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 26 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:19,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:20,008 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4134 (Array Int Int))) (let ((.cse0 (select v_ArrVal_4134 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4134) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 12)) .cse0)) (= 0 .cse0)))) is different from false [2021-12-18 20:10:20,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:10:20,012 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 26 treesize of output 27 [2021-12-18 20:10:20,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:10:20,016 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 44 treesize of output 44 [2021-12-18 20:10:20,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:10:20,019 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 32 treesize of output 32 [2021-12-18 20:10:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 26 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:20,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749925364] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:20,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:20,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 108 [2021-12-18 20:10:20,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892080367] [2021-12-18 20:10:20,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:20,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-18 20:10:20,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-18 20:10:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=11014, Unknown=1, NotChecked=210, Total=11556 [2021-12-18 20:10:20,942 INFO L87 Difference]: Start difference. First operand 10741 states and 12462 transitions. Second operand has 108 states, 108 states have (on average 3.759259259259259) internal successors, (406), 108 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:23,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:23,916 INFO L93 Difference]: Finished difference Result 24932 states and 29014 transitions. [2021-12-18 20:10:23,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-18 20:10:23,916 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.759259259259259) internal successors, (406), 108 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have 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 20:10:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:23,939 INFO L225 Difference]: With dead ends: 24932 [2021-12-18 20:10:23,939 INFO L226 Difference]: Without dead ends: 24825 [2021-12-18 20:10:23,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 148 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3816 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=598, Invalid=21457, Unknown=1, NotChecked=294, Total=22350 [2021-12-18 20:10:23,941 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 419 mSDsluCounter, 9502 mSDsCounter, 0 mSdLazyCounter, 4152 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 9667 SdHoareTripleChecker+Invalid, 6259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2084 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:23,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 9667 Invalid, 6259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4152 Invalid, 0 Unknown, 2084 Unchecked, 1.2s Time] [2021-12-18 20:10:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24825 states. [2021-12-18 20:10:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24825 to 18741. [2021-12-18 20:10:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18741 states, 18739 states have (on average 1.1646299162175142) internal successors, (21824), 18740 states have internal predecessors, (21824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18741 states to 18741 states and 21824 transitions. [2021-12-18 20:10:24,103 INFO L78 Accepts]: Start accepts. Automaton has 18741 states and 21824 transitions. Word has length 169 [2021-12-18 20:10:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:24,103 INFO L470 AbstractCegarLoop]: Abstraction has 18741 states and 21824 transitions. [2021-12-18 20:10:24,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.759259259259259) internal successors, (406), 108 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 18741 states and 21824 transitions. [2021-12-18 20:10:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-18 20:10:24,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:24,110 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:24,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:24,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-12-18 20:10:24,315 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:10:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash -540036078, now seen corresponding path program 29 times [2021-12-18 20:10:24,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:24,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602954438] [2021-12-18 20:10:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:24,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 751 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:25,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:25,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602954438] [2021-12-18 20:10:25,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602954438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:25,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936510012] [2021-12-18 20:10:25,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:10:25,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:25,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:25,007 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:10:25,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-18 20:10:25,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-18 20:10:25,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:10:25,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 139 conjunts are in the unsatisfiable core [2021-12-18 20:10:25,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:25,410 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:10:25,410 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 20:10:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 784 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:27,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 784 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:28,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936510012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:28,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:28,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 102 [2021-12-18 20:10:28,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331983287] [2021-12-18 20:10:28,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:28,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-12-18 20:10:28,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-12-18 20:10:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=8788, Unknown=0, NotChecked=0, Total=10302 [2021-12-18 20:10:28,629 INFO L87 Difference]: Start difference. First operand 18741 states and 21824 transitions. Second operand has 102 states, 102 states have (on average 3.9901960784313726) internal successors, (407), 102 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:39,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:39,498 INFO L93 Difference]: Finished difference Result 35458 states and 39687 transitions. [2021-12-18 20:10:39,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-12-18 20:10:39,498 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.9901960784313726) internal successors, (407), 102 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-12-18 20:10:39,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:39,524 INFO L225 Difference]: With dead ends: 35458 [2021-12-18 20:10:39,525 INFO L226 Difference]: Without dead ends: 35339 [2021-12-18 20:10:39,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34649 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=21562, Invalid=83738, Unknown=0, NotChecked=0, Total=105300 [2021-12-18 20:10:39,528 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 2488 mSDsluCounter, 2901 mSDsCounter, 0 mSdLazyCounter, 3270 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 3077 SdHoareTripleChecker+Invalid, 3552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 3270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:39,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2488 Valid, 3077 Invalid, 3552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 3270 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-18 20:10:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35339 states. [2021-12-18 20:10:39,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35339 to 22984. [2021-12-18 20:10:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22984 states, 22982 states have (on average 1.1697850491689148) internal successors, (26884), 22983 states have internal predecessors, (26884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22984 states to 22984 states and 26884 transitions. [2021-12-18 20:10:39,754 INFO L78 Accepts]: Start accepts. Automaton has 22984 states and 26884 transitions. Word has length 170 [2021-12-18 20:10:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:39,754 INFO L470 AbstractCegarLoop]: Abstraction has 22984 states and 26884 transitions. [2021-12-18 20:10:39,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.9901960784313726) internal successors, (407), 102 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 22984 states and 26884 transitions. [2021-12-18 20:10:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-18 20:10:39,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:39,763 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:39,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:39,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:39,964 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:10:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:39,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2103360866, now seen corresponding path program 14 times [2021-12-18 20:10:39,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:39,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113315161] [2021-12-18 20:10:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:39,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 378 proven. 832 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:10:40,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113315161] [2021-12-18 20:10:40,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113315161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288416270] [2021-12-18 20:10:40,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:10:40,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:40,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:40,648 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:10:40,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-18 20:10:40,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:10:40,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:10:40,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 162 conjunts are in the unsatisfiable core [2021-12-18 20:10:40,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 435 proven. 775 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:10:41,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:42,696 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 20:10:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 435 proven. 775 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:10:42,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288416270] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:42,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:42,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 81 [2021-12-18 20:10:42,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461597457] [2021-12-18 20:10:42,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:42,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-18 20:10:42,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-18 20:10:42,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=6070, Unknown=0, NotChecked=0, Total=6642 [2021-12-18 20:10:42,792 INFO L87 Difference]: Start difference. First operand 22984 states and 26884 transitions. Second operand has 82 states, 81 states have (on average 4.308641975308642) internal successors, (349), 82 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:47,313 INFO L93 Difference]: Finished difference Result 29868 states and 34265 transitions. [2021-12-18 20:10:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-18 20:10:47,314 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 4.308641975308642) internal successors, (349), 82 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have 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 20:10:47,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:47,343 INFO L225 Difference]: With dead ends: 29868 [2021-12-18 20:10:47,343 INFO L226 Difference]: Without dead ends: 29868 [2021-12-18 20:10:47,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 297 SyntacticMatches, 4 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4307, Invalid=17745, Unknown=0, NotChecked=0, Total=22052 [2021-12-18 20:10:47,346 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1472 mSDsluCounter, 4593 mSDsCounter, 0 mSdLazyCounter, 6449 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 4724 SdHoareTripleChecker+Invalid, 6568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 6449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:47,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1472 Valid, 4724 Invalid, 6568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 6449 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-18 20:10:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29868 states. [2021-12-18 20:10:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29868 to 23099. [2021-12-18 20:10:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23099 states, 23097 states have (on average 1.1684634368099753) internal successors, (26988), 23098 states have internal predecessors, (26988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23099 states to 23099 states and 26988 transitions. [2021-12-18 20:10:47,614 INFO L78 Accepts]: Start accepts. Automaton has 23099 states and 26988 transitions. Word has length 172 [2021-12-18 20:10:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:47,614 INFO L470 AbstractCegarLoop]: Abstraction has 23099 states and 26988 transitions. [2021-12-18 20:10:47,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 4.308641975308642) internal successors, (349), 82 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 23099 states and 26988 transitions. [2021-12-18 20:10:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-18 20:10:47,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:47,623 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:47,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:47,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:47,844 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:10:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:47,845 INFO L85 PathProgramCache]: Analyzing trace with hash 864755389, now seen corresponding path program 25 times [2021-12-18 20:10:47,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:47,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561580349] [2021-12-18 20:10:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:47,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 231 proven. 744 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:48,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:48,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561580349] [2021-12-18 20:10:48,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561580349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:48,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521269452] [2021-12-18 20:10:48,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:10:48,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:48,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:48,430 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:10:48,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-18 20:10:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:48,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-18 20:10:48,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 276 proven. 699 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:49,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:50,157 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 20:10:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 276 proven. 699 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:50,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521269452] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:50,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:50,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 66 [2021-12-18 20:10:50,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281919796] [2021-12-18 20:10:50,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:50,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 20:10:50,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:50,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 20:10:50,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=3924, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 20:10:50,259 INFO L87 Difference]: Start difference. First operand 23099 states and 26988 transitions. Second operand has 67 states, 66 states have (on average 5.257575757575758) internal successors, (347), 67 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:52,601 INFO L93 Difference]: Finished difference Result 35425 states and 41326 transitions. [2021-12-18 20:10:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-18 20:10:52,602 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 5.257575757575758) internal successors, (347), 67 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-12-18 20:10:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:52,635 INFO L225 Difference]: With dead ends: 35425 [2021-12-18 20:10:52,636 INFO L226 Difference]: Without dead ends: 35425 [2021-12-18 20:10:52,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 308 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2273, Invalid=9937, Unknown=0, NotChecked=0, Total=12210 [2021-12-18 20:10:52,637 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 1004 mSDsluCounter, 3992 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 4196 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:52,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 4196 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 20:10:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35425 states. [2021-12-18 20:10:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35425 to 23848. [2021-12-18 20:10:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23848 states, 23846 states have (on average 1.168623668539797) internal successors, (27867), 23847 states have internal predecessors, (27867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23848 states to 23848 states and 27867 transitions. [2021-12-18 20:10:52,898 INFO L78 Accepts]: Start accepts. Automaton has 23848 states and 27867 transitions. Word has length 173 [2021-12-18 20:10:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:52,898 INFO L470 AbstractCegarLoop]: Abstraction has 23848 states and 27867 transitions. [2021-12-18 20:10:52,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 5.257575757575758) internal successors, (347), 67 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:10:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 23848 states and 27867 transitions. [2021-12-18 20:10:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-18 20:10:52,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:52,908 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:52,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:53,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:53,121 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:10:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1026691409, now seen corresponding path program 30 times [2021-12-18 20:10:53,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:53,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786750307] [2021-12-18 20:10:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:53,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 53 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:54,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:54,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786750307] [2021-12-18 20:10:54,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786750307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:54,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794613369] [2021-12-18 20:10:54,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:10:54,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:54,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:54,018 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:10:54,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-18 20:10:55,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-18 20:10:55,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:10:55,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 200 conjunts are in the unsatisfiable core [2021-12-18 20:10:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:55,851 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 20:10:56,200 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 20:10:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 53 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:56,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:56,516 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 20:10:56,518 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 20:10:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 53 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:56,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794613369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:56,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:56,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45, 45] total 75 [2021-12-18 20:10:56,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111490853] [2021-12-18 20:10:56,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:56,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-18 20:10:56,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:56,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-18 20:10:56,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5335, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 20:10:56,806 INFO L87 Difference]: Start difference. First operand 23848 states and 27867 transitions. Second operand has 75 states, 75 states have (on average 3.533333333333333) internal successors, (265), 75 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:11:01,085 INFO L93 Difference]: Finished difference Result 32717 states and 37889 transitions. [2021-12-18 20:11:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-18 20:11:01,086 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.533333333333333) internal successors, (265), 75 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-12-18 20:11:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:11:01,117 INFO L225 Difference]: With dead ends: 32717 [2021-12-18 20:11:01,117 INFO L226 Difference]: Without dead ends: 32522 [2021-12-18 20:11:01,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 316 SyntacticMatches, 4 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=838, Invalid=12968, Unknown=0, NotChecked=0, Total=13806 [2021-12-18 20:11:01,118 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 1275 mSDsluCounter, 14009 mSDsCounter, 0 mSdLazyCounter, 11298 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 14318 SdHoareTripleChecker+Invalid, 11626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 11298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:11:01,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 14318 Invalid, 11626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 11298 Invalid, 0 Unknown, 163 Unchecked, 2.8s Time] [2021-12-18 20:11:01,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32522 states. [2021-12-18 20:11:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32522 to 23904. [2021-12-18 20:11:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23904 states, 23902 states have (on average 1.1687724876579366) internal successors, (27936), 23903 states have internal predecessors, (27936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23904 states to 23904 states and 27936 transitions. [2021-12-18 20:11:01,349 INFO L78 Accepts]: Start accepts. Automaton has 23904 states and 27936 transitions. Word has length 174 [2021-12-18 20:11:01,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:11:01,349 INFO L470 AbstractCegarLoop]: Abstraction has 23904 states and 27936 transitions. [2021-12-18 20:11:01,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.533333333333333) internal successors, (265), 75 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 23904 states and 27936 transitions. [2021-12-18 20:11:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-18 20:11:01,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:11:01,358 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:11:01,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-12-18 20:11:01,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-12-18 20:11:01,571 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:11:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:11:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1496115215, now seen corresponding path program 15 times [2021-12-18 20:11:01,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:11:01,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81196473] [2021-12-18 20:11:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:11:01,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:11:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 53 proven. 1244 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:11:02,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:11:02,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81196473] [2021-12-18 20:11:02,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81196473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:11:02,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533989094] [2021-12-18 20:11:02,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:11:02,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:02,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:11:02,141 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:11:02,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-18 20:11:02,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-18 20:11:02,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:11:02,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 190 conjunts are in the unsatisfiable core [2021-12-18 20:11:02,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:11:03,537 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 20:11:03,938 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 20:11:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 53 proven. 1244 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:11:03,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:11:04,246 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 20:11:04,248 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 20:11:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 53 proven. 1244 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:11:04,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533989094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:11:04,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:11:04,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 72 [2021-12-18 20:11:04,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919523734] [2021-12-18 20:11:04,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:11:04,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-18 20:11:04,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:11:04,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-18 20:11:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4905, Unknown=0, NotChecked=0, Total=5112 [2021-12-18 20:11:04,528 INFO L87 Difference]: Start difference. First operand 23904 states and 27936 transitions. Second operand has 72 states, 72 states have (on average 3.861111111111111) internal successors, (278), 72 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:11:09,224 INFO L93 Difference]: Finished difference Result 32248 states and 37330 transitions. [2021-12-18 20:11:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-18 20:11:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.861111111111111) internal successors, (278), 72 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-12-18 20:11:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:11:09,253 INFO L225 Difference]: With dead ends: 32248 [2021-12-18 20:11:09,254 INFO L226 Difference]: Without dead ends: 29702 [2021-12-18 20:11:09,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 323 SyntacticMatches, 4 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=803, Invalid=11853, Unknown=0, NotChecked=0, Total=12656 [2021-12-18 20:11:09,255 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 951 mSDsluCounter, 12473 mSDsCounter, 0 mSdLazyCounter, 10029 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 12764 SdHoareTripleChecker+Invalid, 10415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 10029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:11:09,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 12764 Invalid, 10415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 10029 Invalid, 0 Unknown, 281 Unchecked, 3.1s Time] [2021-12-18 20:11:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29702 states. [2021-12-18 20:11:09,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29702 to 26078. [2021-12-18 20:11:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26078 states, 26076 states have (on average 1.1692744285933425) internal successors, (30490), 26077 states have internal predecessors, (30490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26078 states to 26078 states and 30490 transitions. [2021-12-18 20:11:09,565 INFO L78 Accepts]: Start accepts. Automaton has 26078 states and 30490 transitions. Word has length 177 [2021-12-18 20:11:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:11:09,565 INFO L470 AbstractCegarLoop]: Abstraction has 26078 states and 30490 transitions. [2021-12-18 20:11:09,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.861111111111111) internal successors, (278), 72 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 26078 states and 30490 transitions. [2021-12-18 20:11:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-18 20:11:09,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:11:09,574 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:11:09,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-12-18 20:11:09,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-12-18 20:11:09,794 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:11:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:11:09,795 INFO L85 PathProgramCache]: Analyzing trace with hash 818123468, now seen corresponding path program 31 times [2021-12-18 20:11:09,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:11:09,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168565257] [2021-12-18 20:11:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:11:09,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:11:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 496 proven. 935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:11:10,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:11:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168565257] [2021-12-18 20:11:10,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168565257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:11:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222386643] [2021-12-18 20:11:10,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:11:10,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:10,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:11:10,398 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:11:10,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-18 20:11:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:10,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 180 conjunts are in the unsatisfiable core [2021-12-18 20:11:10,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:11:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 561 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:11:11,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:11:13,041 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 20:11:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 561 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:11:13,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222386643] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:11:13,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:11:13,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 89 [2021-12-18 20:11:13,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107921800] [2021-12-18 20:11:13,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:11:13,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-18 20:11:13,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:11:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-18 20:11:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=7319, Unknown=0, NotChecked=0, Total=8010 [2021-12-18 20:11:13,141 INFO L87 Difference]: Start difference. First operand 26078 states and 30490 transitions. Second operand has 90 states, 89 states have (on average 4.033707865168539) internal successors, (359), 90 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:11:18,493 INFO L93 Difference]: Finished difference Result 31875 states and 36861 transitions. [2021-12-18 20:11:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-18 20:11:18,494 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 4.033707865168539) internal successors, (359), 90 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-12-18 20:11:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:11:18,518 INFO L225 Difference]: With dead ends: 31875 [2021-12-18 20:11:18,519 INFO L226 Difference]: Without dead ends: 31875 [2021-12-18 20:11:18,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 306 SyntacticMatches, 3 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4190 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5301, Invalid=21759, Unknown=0, NotChecked=0, Total=27060 [2021-12-18 20:11:18,520 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 1736 mSDsluCounter, 4692 mSDsCounter, 0 mSdLazyCounter, 7097 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 4843 SdHoareTripleChecker+Invalid, 7228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 7097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:11:18,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1736 Valid, 4843 Invalid, 7228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 7097 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-18 20:11:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31875 states. [2021-12-18 20:11:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31875 to 26355. [2021-12-18 20:11:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26355 states, 26353 states have (on average 1.1698098888172124) internal successors, (30828), 26354 states have internal predecessors, (30828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26355 states to 26355 states and 30828 transitions. [2021-12-18 20:11:18,804 INFO L78 Accepts]: Start accepts. Automaton has 26355 states and 30828 transitions. Word has length 178 [2021-12-18 20:11:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:11:18,805 INFO L470 AbstractCegarLoop]: Abstraction has 26355 states and 30828 transitions. [2021-12-18 20:11:18,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 4.033707865168539) internal successors, (359), 90 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 26355 states and 30828 transitions. [2021-12-18 20:11:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-18 20:11:18,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:11:18,815 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:11:18,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-12-18 20:11:19,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-12-18 20:11:19,038 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:11:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:11:19,038 INFO L85 PathProgramCache]: Analyzing trace with hash -822166384, now seen corresponding path program 9 times [2021-12-18 20:11:19,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:11:19,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345388237] [2021-12-18 20:11:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:11:19,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:11:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 26 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:11:19,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:11:19,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345388237] [2021-12-18 20:11:19,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345388237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:11:19,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625470866] [2021-12-18 20:11:19,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:11:19,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:19,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:11:19,539 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:11:19,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-18 20:11:20,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-18 20:11:20,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:11:20,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-18 20:11:20,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:11:20,128 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:11:20,128 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 20:11:21,395 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 20:11:21,479 INFO L354 Elim1Store]: treesize reduction 38, result has 20.8 percent of original size [2021-12-18 20:11:21,479 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-18 20:11:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:11:24,436 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-18 20:11:24,436 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 10 [2021-12-18 20:11:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 27 proven. 966 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:11:24,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:11:25,860 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 56 treesize of output 50 [2021-12-18 20:11:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 26 proven. 967 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:11:28,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625470866] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:11:28,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:11:28,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 41, 41] total 109 [2021-12-18 20:11:28,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845084379] [2021-12-18 20:11:28,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:11:28,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-18 20:11:28,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:11:28,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-18 20:11:28,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=11404, Unknown=0, NotChecked=0, Total=11772 [2021-12-18 20:11:28,904 INFO L87 Difference]: Start difference. First operand 26355 states and 30828 transitions. Second operand has 109 states, 109 states have (on average 4.541284403669724) internal successors, (495), 109 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:11:32,325 INFO L93 Difference]: Finished difference Result 27327 states and 31803 transitions. [2021-12-18 20:11:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-18 20:11:32,325 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 4.541284403669724) internal successors, (495), 109 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-12-18 20:11:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:11:32,341 INFO L225 Difference]: With dead ends: 27327 [2021-12-18 20:11:32,341 INFO L226 Difference]: Without dead ends: 18671 [2021-12-18 20:11:32,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4197 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=733, Invalid=24073, Unknown=0, NotChecked=0, Total=24806 [2021-12-18 20:11:32,343 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 361 mSDsluCounter, 8295 mSDsCounter, 0 mSdLazyCounter, 3561 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 8456 SdHoareTripleChecker+Invalid, 5998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2432 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:11:32,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 8456 Invalid, 5998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3561 Invalid, 0 Unknown, 2432 Unchecked, 1.0s Time] [2021-12-18 20:11:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18671 states. [2021-12-18 20:11:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18671 to 16463. [2021-12-18 20:11:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16463 states, 16461 states have (on average 1.1670615393961485) internal successors, (19211), 16462 states have internal predecessors, (19211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16463 states to 16463 states and 19211 transitions. [2021-12-18 20:11:32,483 INFO L78 Accepts]: Start accepts. Automaton has 16463 states and 19211 transitions. Word has length 178 [2021-12-18 20:11:32,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:11:32,484 INFO L470 AbstractCegarLoop]: Abstraction has 16463 states and 19211 transitions. [2021-12-18 20:11:32,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 4.541284403669724) internal successors, (495), 109 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:32,484 INFO L276 IsEmpty]: Start isEmpty. Operand 16463 states and 19211 transitions. [2021-12-18 20:11:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-18 20:11:32,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:11:32,491 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:11:32,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-12-18 20:11:32,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-12-18 20:11:32,694 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:11:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:11:32,694 INFO L85 PathProgramCache]: Analyzing trace with hash 733446610, now seen corresponding path program 16 times [2021-12-18 20:11:32,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:11:32,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778235235] [2021-12-18 20:11:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:11:32,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:11:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 435 proven. 927 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:11:33,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:11:33,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778235235] [2021-12-18 20:11:33,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778235235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:11:33,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068784013] [2021-12-18 20:11:33,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:11:33,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:33,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:11:33,275 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:11:33,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-18 20:11:33,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:11:33,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:11:33,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 186 conjunts are in the unsatisfiable core [2021-12-18 20:11:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:11:33,589 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:11:33,589 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 20:11:33,915 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 20:11:35,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:35,071 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 21 treesize of output 21 [2021-12-18 20:11:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 512 proven. 850 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:11:35,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:11:37,010 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 20:11:37,012 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 20:11:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 561 proven. 801 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:11:39,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068784013] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:11:39,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:11:39,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 45, 45] total 113 [2021-12-18 20:11:39,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965503958] [2021-12-18 20:11:39,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:11:39,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-18 20:11:39,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:11:39,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-18 20:11:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1243, Invalid=11639, Unknown=0, NotChecked=0, Total=12882 [2021-12-18 20:11:39,508 INFO L87 Difference]: Start difference. First operand 16463 states and 19211 transitions. Second operand has 114 states, 113 states have (on average 4.097345132743363) internal successors, (463), 114 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:11:51,525 INFO L93 Difference]: Finished difference Result 22753 states and 25896 transitions. [2021-12-18 20:11:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-12-18 20:11:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 4.097345132743363) internal successors, (463), 114 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-12-18 20:11:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:11:51,543 INFO L225 Difference]: With dead ends: 22753 [2021-12-18 20:11:51,543 INFO L226 Difference]: Without dead ends: 19631 [2021-12-18 20:11:51,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 287 SyntacticMatches, 7 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8753 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=10293, Invalid=44697, Unknown=0, NotChecked=0, Total=54990 [2021-12-18 20:11:51,545 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 2660 mSDsluCounter, 5723 mSDsCounter, 0 mSdLazyCounter, 8474 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2660 SdHoareTripleChecker+Valid, 5864 SdHoareTripleChecker+Invalid, 9548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 8474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:11:51,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2660 Valid, 5864 Invalid, 9548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 8474 Invalid, 0 Unknown, 300 Unchecked, 3.2s Time] [2021-12-18 20:11:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19631 states. [2021-12-18 20:11:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19631 to 14313. [2021-12-18 20:11:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14313 states, 14311 states have (on average 1.1639298441758088) internal successors, (16657), 14312 states have internal predecessors, (16657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:51,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14313 states to 14313 states and 16657 transitions. [2021-12-18 20:11:51,698 INFO L78 Accepts]: Start accepts. Automaton has 14313 states and 16657 transitions. Word has length 181 [2021-12-18 20:11:51,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:11:51,699 INFO L470 AbstractCegarLoop]: Abstraction has 14313 states and 16657 transitions. [2021-12-18 20:11:51,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 4.097345132743363) internal successors, (463), 114 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:11:51,699 INFO L276 IsEmpty]: Start isEmpty. Operand 14313 states and 16657 transitions. [2021-12-18 20:11:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-18 20:11:51,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:11:51,704 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 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] [2021-12-18 20:11:51,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-12-18 20:11:51,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:51,920 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:11:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:11:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1404335160, now seen corresponding path program 26 times [2021-12-18 20:11:51,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:11:51,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347574308] [2021-12-18 20:11:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:11:51,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:11:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 28 proven. 1053 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:11:53,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:11:53,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347574308] [2021-12-18 20:11:53,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347574308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:11:53,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624982924] [2021-12-18 20:11:53,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:11:53,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:11:53,017 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:11:53,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-18 20:11:53,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:11:53,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:11:53,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 209 conjunts are in the unsatisfiable core [2021-12-18 20:11:53,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:11:53,372 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 10 treesize of output 8 [2021-12-18 20:11:54,217 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 20:11:54,284 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 20:11:57,125 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:11:57,125 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 20:11:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 28 proven. 1053 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:11:57,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:11:58,412 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (v_ArrVal_4897 (Array Int Int))) (let ((.cse0 (select v_ArrVal_4897 |ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= 0 .cse0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4897) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 13)) .cse0))))) is different from false [2021-12-18 20:11:58,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:58,419 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 26 treesize of output 27 [2021-12-18 20:11:58,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:58,424 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 44 treesize of output 44 [2021-12-18 20:11:58,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:58,430 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 32 treesize of output 32 [2021-12-18 20:11:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 33 proven. 1048 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:11:58,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624982924] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:11:58,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:11:58,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 46] total 100 [2021-12-18 20:11:58,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419267275] [2021-12-18 20:11:58,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:11:58,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-18 20:11:58,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:11:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-18 20:11:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=9379, Unknown=2, NotChecked=194, Total=9900 [2021-12-18 20:11:58,918 INFO L87 Difference]: Start difference. First operand 14313 states and 16657 transitions. Second operand has 100 states, 100 states have (on average 3.79) internal successors, (379), 100 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:01,860 INFO L93 Difference]: Finished difference Result 16189 states and 18735 transitions. [2021-12-18 20:12:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-18 20:12:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.79) internal successors, (379), 100 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-12-18 20:12:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:01,875 INFO L225 Difference]: With dead ends: 16189 [2021-12-18 20:12:01,875 INFO L226 Difference]: Without dead ends: 16074 [2021-12-18 20:12:01,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 304 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=482, Invalid=14040, Unknown=2, NotChecked=238, Total=14762 [2021-12-18 20:12:01,877 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 383 mSDsluCounter, 5578 mSDsCounter, 0 mSdLazyCounter, 4574 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 5708 SdHoareTripleChecker+Invalid, 6693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 4574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2092 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:01,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 5708 Invalid, 6693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 4574 Invalid, 0 Unknown, 2092 Unchecked, 1.7s Time] [2021-12-18 20:12:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16074 states. [2021-12-18 20:12:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16074 to 16023. [2021-12-18 20:12:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16023 states, 16021 states have (on average 1.1590412583484178) internal successors, (18569), 16022 states have internal predecessors, (18569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16023 states to 16023 states and 18569 transitions. [2021-12-18 20:12:02,011 INFO L78 Accepts]: Start accepts. Automaton has 16023 states and 18569 transitions. Word has length 181 [2021-12-18 20:12:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:02,011 INFO L470 AbstractCegarLoop]: Abstraction has 16023 states and 18569 transitions. [2021-12-18 20:12:02,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.79) internal successors, (379), 100 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 16023 states and 18569 transitions. [2021-12-18 20:12:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-18 20:12:02,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:02,018 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:12:02,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-12-18 20:12:02,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-12-18 20:12:02,231 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:12:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1365697765, now seen corresponding path program 32 times [2021-12-18 20:12:02,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:12:02,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827832684] [2021-12-18 20:12:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:12:02,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:12:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 56 proven. 1467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:02,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:12:02,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827832684] [2021-12-18 20:12:02,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827832684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:12:02,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64504860] [2021-12-18 20:12:02,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:12:02,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:02,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:12:02,986 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:12:02,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-18 20:12:03,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:12:03,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:12:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 210 conjunts are in the unsatisfiable core [2021-12-18 20:12:03,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:03,803 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 20:12:04,080 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 20:12:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 56 proven. 1467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:04,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:12:04,341 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 20:12:04,343 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 20:12:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 56 proven. 1467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:04,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64504860] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:12:04,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:12:04,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 47, 47] total 78 [2021-12-18 20:12:04,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196418399] [2021-12-18 20:12:04,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:12:04,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-18 20:12:04,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:12:04,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-18 20:12:04,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=5783, Unknown=0, NotChecked=0, Total=6006 [2021-12-18 20:12:04,539 INFO L87 Difference]: Start difference. First operand 16023 states and 18569 transitions. Second operand has 78 states, 78 states have (on average 3.5641025641025643) internal successors, (278), 78 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:09,520 INFO L93 Difference]: Finished difference Result 21925 states and 25156 transitions. [2021-12-18 20:12:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-18 20:12:09,520 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.5641025641025643) internal successors, (278), 78 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-12-18 20:12:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:09,539 INFO L225 Difference]: With dead ends: 21925 [2021-12-18 20:12:09,539 INFO L226 Difference]: Without dead ends: 19909 [2021-12-18 20:12:09,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 333 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=781, Invalid=14471, Unknown=0, NotChecked=0, Total=15252 [2021-12-18 20:12:09,541 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 1647 mSDsluCounter, 14528 mSDsCounter, 0 mSdLazyCounter, 11859 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 14855 SdHoareTripleChecker+Invalid, 12367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 11859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:09,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1647 Valid, 14855 Invalid, 12367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 11859 Invalid, 0 Unknown, 199 Unchecked, 3.3s Time] [2021-12-18 20:12:09,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19909 states. [2021-12-18 20:12:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19909 to 17505. [2021-12-18 20:12:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17505 states, 17503 states have (on average 1.1600868422556134) internal successors, (20305), 17504 states have internal predecessors, (20305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17505 states to 17505 states and 20305 transitions. [2021-12-18 20:12:09,695 INFO L78 Accepts]: Start accepts. Automaton has 17505 states and 20305 transitions. Word has length 183 [2021-12-18 20:12:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:09,695 INFO L470 AbstractCegarLoop]: Abstraction has 17505 states and 20305 transitions. [2021-12-18 20:12:09,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.5641025641025643) internal successors, (278), 78 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 17505 states and 20305 transitions. [2021-12-18 20:12:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-18 20:12:09,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:09,703 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 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] [2021-12-18 20:12:09,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-12-18 20:12:09,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-12-18 20:12:09,922 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:12:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash 300542155, now seen corresponding path program 27 times [2021-12-18 20:12:09,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:12:09,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701046072] [2021-12-18 20:12:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:12:09,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:12:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 276 proven. 858 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:12:10,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:12:10,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701046072] [2021-12-18 20:12:10,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701046072] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:12:10,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471141626] [2021-12-18 20:12:10,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:12:10,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:10,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:12:10,368 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:12:10,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-18 20:12:11,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-18 20:12:11,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:12:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 154 conjunts are in the unsatisfiable core [2021-12-18 20:12:11,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:11,066 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:12:11,067 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 20:12:12,571 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 20:12:15,172 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-12-18 20:12:15,172 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 15 [2021-12-18 20:12:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 325 proven. 810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:15,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:12:18,245 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 37 treesize of output 31 [2021-12-18 20:12:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 378 proven. 757 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:21,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471141626] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:12:21,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:12:21,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 42, 41] total 115 [2021-12-18 20:12:21,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401963372] [2021-12-18 20:12:21,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:12:21,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-18 20:12:21,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:12:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-18 20:12:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=12138, Unknown=0, NotChecked=0, Total=13340 [2021-12-18 20:12:21,734 INFO L87 Difference]: Start difference. First operand 17505 states and 20305 transitions. Second operand has 116 states, 115 states have (on average 4.756521739130434) internal successors, (547), 116 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:42,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:42,046 INFO L93 Difference]: Finished difference Result 39169 states and 45720 transitions. [2021-12-18 20:12:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-12-18 20:12:42,046 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 4.756521739130434) internal successors, (547), 116 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-12-18 20:12:42,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:42,086 INFO L225 Difference]: With dead ends: 39169 [2021-12-18 20:12:42,087 INFO L226 Difference]: Without dead ends: 39169 [2021-12-18 20:12:42,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 299 SyntacticMatches, 28 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20446 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=15608, Invalid=65902, Unknown=0, NotChecked=0, Total=81510 [2021-12-18 20:12:42,091 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 2383 mSDsluCounter, 4700 mSDsCounter, 0 mSdLazyCounter, 4385 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 4880 SdHoareTripleChecker+Invalid, 7349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 4385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2710 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:42,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 4880 Invalid, 7349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 4385 Invalid, 0 Unknown, 2710 Unchecked, 1.8s Time] [2021-12-18 20:12:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39169 states. [2021-12-18 20:12:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39169 to 18440. [2021-12-18 20:12:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18440 states, 18438 states have (on average 1.1608091983946198) internal successors, (21403), 18439 states have internal predecessors, (21403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18440 states to 18440 states and 21403 transitions. [2021-12-18 20:12:42,356 INFO L78 Accepts]: Start accepts. Automaton has 18440 states and 21403 transitions. Word has length 185 [2021-12-18 20:12:42,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:42,356 INFO L470 AbstractCegarLoop]: Abstraction has 18440 states and 21403 transitions. [2021-12-18 20:12:42,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 4.756521739130434) internal successors, (547), 116 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 18440 states and 21403 transitions. [2021-12-18 20:12:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-18 20:12:42,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:42,364 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:12:42,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-12-18 20:12:42,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-12-18 20:12:42,579 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:12:42,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:42,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2145096040, now seen corresponding path program 33 times [2021-12-18 20:12:42,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:12:42,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807885601] [2021-12-18 20:12:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:12:42,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:12:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 561 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:43,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:12:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807885601] [2021-12-18 20:12:43,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807885601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:12:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070680616] [2021-12-18 20:12:43,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:12:43,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:43,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:12:43,524 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:12:43,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-18 20:12:44,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-12-18 20:12:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:12:44,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 197 conjunts are in the unsatisfiable core [2021-12-18 20:12:44,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:44,314 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:12:44,314 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 20:12:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 630 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:46,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:12:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 703 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:49,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070680616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:12:49,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:12:49,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 127 [2021-12-18 20:12:49,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024704074] [2021-12-18 20:12:49,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:12:49,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-18 20:12:49,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:12:49,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-18 20:12:49,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1825, Invalid=14431, Unknown=0, NotChecked=0, Total=16256 [2021-12-18 20:12:49,538 INFO L87 Difference]: Start difference. First operand 18440 states and 21403 transitions. Second operand has 128 states, 127 states have (on average 4.25984251968504) internal successors, (541), 128 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:55,478 INFO L93 Difference]: Finished difference Result 21914 states and 25133 transitions. [2021-12-18 20:12:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-18 20:12:55,479 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 4.25984251968504) internal successors, (541), 128 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-12-18 20:12:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:55,496 INFO L225 Difference]: With dead ends: 21914 [2021-12-18 20:12:55,496 INFO L226 Difference]: Without dead ends: 21914 [2021-12-18 20:12:55,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9291 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=8289, Invalid=33941, Unknown=0, NotChecked=0, Total=42230 [2021-12-18 20:12:55,498 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 1530 mSDsluCounter, 6268 mSDsCounter, 0 mSdLazyCounter, 8478 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 6425 SdHoareTripleChecker+Invalid, 8608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 8478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:55,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1530 Valid, 6425 Invalid, 8608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 8478 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-18 20:12:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21914 states. [2021-12-18 20:12:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21914 to 18580. [2021-12-18 20:12:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18580 states, 18578 states have (on average 1.161050705135106) internal successors, (21570), 18579 states have internal predecessors, (21570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18580 states to 18580 states and 21570 transitions. [2021-12-18 20:12:55,667 INFO L78 Accepts]: Start accepts. Automaton has 18580 states and 21570 transitions. Word has length 187 [2021-12-18 20:12:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:55,667 INFO L470 AbstractCegarLoop]: Abstraction has 18580 states and 21570 transitions. [2021-12-18 20:12:55,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 4.25984251968504) internal successors, (541), 128 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:12:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 18580 states and 21570 transitions. [2021-12-18 20:12:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-18 20:12:55,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:55,675 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:12:55,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-12-18 20:12:55,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:55,892 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:12:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 893526528, now seen corresponding path program 10 times [2021-12-18 20:12:55,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:12:55,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958625314] [2021-12-18 20:12:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:12:55,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:12:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 33 proven. 1118 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:12:57,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:12:57,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958625314] [2021-12-18 20:12:57,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958625314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:12:57,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679559597] [2021-12-18 20:12:57,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:12:57,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:57,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:12:57,199 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:12:57,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-18 20:12:57,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:12:57,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:12:57,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 171 conjunts are in the unsatisfiable core [2021-12-18 20:12:57,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:57,581 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:12:57,581 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 20:12:59,013 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 20:12:59,100 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:12:59,100 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-18 20:12:59,108 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 7 treesize of output 3 [2021-12-18 20:13:03,502 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:13:03,502 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 23 treesize of output 19 [2021-12-18 20:13:03,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:13:03,843 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-12-18 20:13:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 708 proven. 444 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 20:13:03,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:13:07,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:13:07,052 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 24 treesize of output 25 [2021-12-18 20:13:07,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:13:07,058 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 40 treesize of output 40 [2021-12-18 20:13:07,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:13:07,065 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 30 treesize of output 30 [2021-12-18 20:13:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 646 proven. 506 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 20:13:10,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679559597] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:13:10,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:13:10,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 143 [2021-12-18 20:13:10,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317007685] [2021-12-18 20:13:10,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:13:10,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-12-18 20:13:10,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:13:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-12-18 20:13:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=19006, Unknown=3, NotChecked=0, Total=20306 [2021-12-18 20:13:10,149 INFO L87 Difference]: Start difference. First operand 18580 states and 21570 transitions. Second operand has 143 states, 143 states have (on average 3.7762237762237763) internal successors, (540), 143 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:13:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:13:32,829 INFO L93 Difference]: Finished difference Result 24842 states and 28692 transitions. [2021-12-18 20:13:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2021-12-18 20:13:32,830 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 3.7762237762237763) internal successors, (540), 143 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-12-18 20:13:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:13:32,849 INFO L225 Difference]: With dead ends: 24842 [2021-12-18 20:13:32,849 INFO L226 Difference]: Without dead ends: 24842 [2021-12-18 20:13:32,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 305 SyntacticMatches, 3 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37877 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=7551, Invalid=127502, Unknown=3, NotChecked=0, Total=135056 [2021-12-18 20:13:32,853 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1882 mSDsluCounter, 2862 mSDsCounter, 0 mSdLazyCounter, 6214 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 2911 SdHoareTripleChecker+Invalid, 8130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 6214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1433 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:13:32,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1882 Valid, 2911 Invalid, 8130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 6214 Invalid, 0 Unknown, 1433 Unchecked, 2.6s Time] [2021-12-18 20:13:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24842 states. [2021-12-18 20:13:32,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24842 to 22176. [2021-12-18 20:13:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22176 states, 22174 states have (on average 1.1592856498601967) internal successors, (25706), 22175 states have internal predecessors, (25706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:13:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22176 states to 22176 states and 25706 transitions. [2021-12-18 20:13:33,025 INFO L78 Accepts]: Start accepts. Automaton has 22176 states and 25706 transitions. Word has length 190 [2021-12-18 20:13:33,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:13:33,025 INFO L470 AbstractCegarLoop]: Abstraction has 22176 states and 25706 transitions. [2021-12-18 20:13:33,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 3.7762237762237763) internal successors, (540), 143 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:13:33,026 INFO L276 IsEmpty]: Start isEmpty. Operand 22176 states and 25706 transitions. [2021-12-18 20:13:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-18 20:13:33,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:13:33,036 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:13:33,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-12-18 20:13:33,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-12-18 20:13:33,250 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:13:33,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:13:33,251 INFO L85 PathProgramCache]: Analyzing trace with hash 670204362, now seen corresponding path program 11 times [2021-12-18 20:13:33,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:13:33,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148784331] [2021-12-18 20:13:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:13:33,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:13:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:13:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 28 proven. 1118 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-18 20:13:34,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:13:34,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148784331] [2021-12-18 20:13:34,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148784331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:13:34,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126909671] [2021-12-18 20:13:34,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:13:34,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:13:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:13:34,215 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:13:34,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-18 20:13:34,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-18 20:13:34,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:13:34,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 218 conjunts are in the unsatisfiable core [2021-12-18 20:13:34,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:13:34,750 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:13:34,751 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 20:13:35,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:13:35,661 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 14 treesize of output 18 [2021-12-18 20:13:36,214 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 20:13:36,285 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 20:13:39,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:13:39,261 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 14 [2021-12-18 20:13:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 28 proven. 1124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 20:13:39,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:13:40,576 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5333 (Array Int Int)) (|ULTIMATE.start_cstrspn_~s2#1.offset| Int)) (let ((.cse0 (select v_ArrVal_5333 |ULTIMATE.start_cstrspn_~s2#1.offset|))) (or (= 0 .cse0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_5333) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 13)) .cse0))))) is different from false [2021-12-18 20:13:40,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:13:40,582 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 26 treesize of output 27 [2021-12-18 20:13:40,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:13:40,607 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 44 treesize of output 44 [2021-12-18 20:13:40,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:13:40,612 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 32 treesize of output 32 [2021-12-18 20:13:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 28 proven. 1124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 20:13:43,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126909671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:13:43,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:13:43,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 51, 51] total 127 [2021-12-18 20:13:43,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356883126] [2021-12-18 20:13:43,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:13:43,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-12-18 20:13:43,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:13:43,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-12-18 20:13:43,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=15326, Unknown=1, NotChecked=248, Total=16002 [2021-12-18 20:13:43,045 INFO L87 Difference]: Start difference. First operand 22176 states and 25706 transitions. Second operand has 127 states, 127 states have (on average 3.62992125984252) internal successors, (461), 127 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:13:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:13:52,431 INFO L93 Difference]: Finished difference Result 44572 states and 51801 transitions. [2021-12-18 20:13:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-12-18 20:13:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.62992125984252) internal successors, (461), 127 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-12-18 20:13:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:13:52,472 INFO L225 Difference]: With dead ends: 44572 [2021-12-18 20:13:52,472 INFO L226 Difference]: Without dead ends: 44572 [2021-12-18 20:13:52,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 301 SyntacticMatches, 3 SemanticMatches, 224 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11108 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1302, Invalid=49101, Unknown=1, NotChecked=446, Total=50850 [2021-12-18 20:13:52,476 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 748 mSDsluCounter, 7576 mSDsCounter, 0 mSdLazyCounter, 11341 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 7710 SdHoareTripleChecker+Invalid, 17991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 11341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6506 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:13:52,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 7710 Invalid, 17991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 11341 Invalid, 0 Unknown, 6506 Unchecked, 3.6s Time] [2021-12-18 20:13:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44572 states. [2021-12-18 20:13:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44572 to 29964. [2021-12-18 20:13:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29964 states, 29962 states have (on average 1.1697483479073494) internal successors, (35048), 29963 states have internal predecessors, (35048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:13:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29964 states to 29964 states and 35048 transitions. [2021-12-18 20:13:52,855 INFO L78 Accepts]: Start accepts. Automaton has 29964 states and 35048 transitions. Word has length 190 [2021-12-18 20:13:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:13:52,856 INFO L470 AbstractCegarLoop]: Abstraction has 29964 states and 35048 transitions. [2021-12-18 20:13:52,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.62992125984252) internal successors, (461), 127 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:13:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 29964 states and 35048 transitions. [2021-12-18 20:13:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-18 20:13:52,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:13:52,868 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:13:52,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-12-18 20:13:53,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-12-18 20:13:53,088 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 20:13:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:13:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1147057342, now seen corresponding path program 12 times [2021-12-18 20:13:53,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:13:53,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711282047] [2021-12-18 20:13:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:13:53,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:13:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:13:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 28 proven. 1119 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:13:53,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:13:53,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711282047] [2021-12-18 20:13:53,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711282047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:13:53,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902161829] [2021-12-18 20:13:53,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:13:53,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:13:53,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:13:53,872 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:13:53,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-12-18 20:13:54,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-18 20:13:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:13:54,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 190 conjunts are in the unsatisfiable core [2021-12-18 20:13:54,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:13:54,657 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:13:54,658 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 20:13:55,822 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 20:13:55,889 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:13:55,889 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 20:13:55,912 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 8 treesize of output 3 [2021-12-18 20:14:01,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:14:01,597 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 22 treesize of output 11 [2021-12-18 20:14:01,602 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:14:01,602 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 11 treesize of output 11 [2021-12-18 20:14:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 29 proven. 1124 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:14:01,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15