./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0235-2.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 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:50:01,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:50:01,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:50:01,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:50:01,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:50:01,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:50:01,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:50:01,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:50:01,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:50:01,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:50:01,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:50:01,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:50:01,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:50:01,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:50:01,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:50:01,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:50:01,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:50:01,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:50:01,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:50:01,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:50:01,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:50:01,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:50:01,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:50:01,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:50:01,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:50:01,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:50:01,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:50:01,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:50:01,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:50:01,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:50:01,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:50:01,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:50:01,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:50:01,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:50:01,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:50:01,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:50:01,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:50:01,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:50:01,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:50:01,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:50:01,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:50:01,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:50:01,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:50:01,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:50:01,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:50:01,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:50:01,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:50:01,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:50:01,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:50:01,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:50:01,781 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:50:01,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:50:01,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:50:01,783 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:50:01,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:50:01,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:50:01,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:50:01,783 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:50:01,784 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:50:01,784 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:50:01,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:50:01,784 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:50:01,784 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:50:01,784 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:50:01,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:50:01,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:50:01,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:50:01,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:50:01,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:50:01,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:50:01,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:50:01,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:50:01,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2021-12-28 05:50:02,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:50:02,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:50:02,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:50:02,122 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:50:02,123 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:50:02,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-2.i [2021-12-28 05:50:02,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf7a14d9c/609232941a434383a7d5c866e670ec31/FLAG1c1a56e78 [2021-12-28 05:50:02,769 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:50:02,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i [2021-12-28 05:50:02,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf7a14d9c/609232941a434383a7d5c866e670ec31/FLAG1c1a56e78 [2021-12-28 05:50:03,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf7a14d9c/609232941a434383a7d5c866e670ec31 [2021-12-28 05:50:03,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:50:03,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:50:03,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:50:03,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:50:03,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:50:03,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24083b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03, skipping insertion in model container [2021-12-28 05:50:03,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:50:03,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:50:03,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:50:03,475 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:50:03,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:50:03,572 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:50:03,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03 WrapperNode [2021-12-28 05:50:03,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:50:03,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:50:03,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:50:03,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:50:03,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,638 INFO L137 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 237 [2021-12-28 05:50:03,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:50:03,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:50:03,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:50:03,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:50:03,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:50:03,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:50:03,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:50:03,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:50:03,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (1/1) ... [2021-12-28 05:50:03,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:50:03,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:03,711 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) [2021-12-28 05:50:03,713 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 [2021-12-28 05:50:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 05:50:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 05:50:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 05:50:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 05:50:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-12-28 05:50:03,754 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-12-28 05:50:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:50:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 05:50:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2021-12-28 05:50:03,754 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2021-12-28 05:50:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 05:50:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:50:03,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:50:03,928 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:50:03,929 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:50:04,510 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:50:04,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:50:04,519 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-28 05:50:04,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:50:04 BoogieIcfgContainer [2021-12-28 05:50:04,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:50:04,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:50:04,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:50:04,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:50:04,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:50:03" (1/3) ... [2021-12-28 05:50:04,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f824063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:50:04, skipping insertion in model container [2021-12-28 05:50:04,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:50:03" (2/3) ... [2021-12-28 05:50:04,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f824063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:50:04, skipping insertion in model container [2021-12-28 05:50:04,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:50:04" (3/3) ... [2021-12-28 05:50:04,528 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2021-12-28 05:50:04,532 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:50:04,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2021-12-28 05:50:04,571 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:50:04,577 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 [2021-12-28 05:50:04,577 INFO L340 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2021-12-28 05:50:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-28 05:50:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-28 05:50:04,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:04,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-28 05:50:04,606 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:04,610 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2021-12-28 05:50:04,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:04,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430321953] [2021-12-28 05:50:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:04,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:04,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:04,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430321953] [2021-12-28 05:50:04,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430321953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:50:04,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:50:04,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:50:04,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374268576] [2021-12-28 05:50:04,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:50:04,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 05:50:04,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:04,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 05:50:04,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 05:50:04,783 INFO L87 Difference]: Start difference. First operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:50:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:04,815 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2021-12-28 05:50:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 05:50:04,817 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-28 05:50:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:04,825 INFO L225 Difference]: With dead ends: 238 [2021-12-28 05:50:04,825 INFO L226 Difference]: Without dead ends: 236 [2021-12-28 05:50:04,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 05:50:04,830 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:04,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:50:04,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-28 05:50:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-12-28 05:50:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 1.7925925925925925) internal successors, (242), 221 states have internal predecessors, (242), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-28 05:50:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2021-12-28 05:50:04,883 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 4 [2021-12-28 05:50:04,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:04,885 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2021-12-28 05:50:04,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:50:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2021-12-28 05:50:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:50:04,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:04,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:50:04,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 05:50:04,886 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 889937946, now seen corresponding path program 1 times [2021-12-28 05:50:04,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:04,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840990019] [2021-12-28 05:50:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:04,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:04,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:04,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721613883] [2021-12-28 05:50:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:04,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:04,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:04,907 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) [2021-12-28 05:50:04,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 05:50:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 05:50:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:05,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:50:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:05,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:50:05,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:05,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840990019] [2021-12-28 05:50:05,110 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:05,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721613883] [2021-12-28 05:50:05,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721613883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:50:05,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:50:05,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:50:05,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248750605] [2021-12-28 05:50:05,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:50:05,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:50:05,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:05,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:50:05,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:50:05,121 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:50:05,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:05,297 INFO L93 Difference]: Finished difference Result 235 states and 265 transitions. [2021-12-28 05:50:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:50:05,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 05:50:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:05,305 INFO L225 Difference]: With dead ends: 235 [2021-12-28 05:50:05,308 INFO L226 Difference]: Without dead ends: 235 [2021-12-28 05:50:05,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:50:05,310 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 9 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:05,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 428 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:50:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-28 05:50:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-12-28 05:50:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 135 states have (on average 1.7851851851851852) internal successors, (241), 220 states have internal predecessors, (241), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-28 05:50:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2021-12-28 05:50:05,331 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 6 [2021-12-28 05:50:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:05,332 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2021-12-28 05:50:05,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:50:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2021-12-28 05:50:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:50:05,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:05,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:05,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:05,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:05,540 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1818272976, now seen corresponding path program 1 times [2021-12-28 05:50:05,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:05,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363818189] [2021-12-28 05:50:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:05,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:05,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:05,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402385846] [2021-12-28 05:50:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:05,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:05,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:05,560 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) [2021-12-28 05:50:05,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 05:50:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 05:50:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:05,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:50:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:05,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:50:05,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:05,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363818189] [2021-12-28 05:50:05,787 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:05,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402385846] [2021-12-28 05:50:05,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402385846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:50:05,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:50:05,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:50:05,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347982928] [2021-12-28 05:50:05,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:50:05,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:50:05,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:05,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:50:05,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:50:05,791 INFO L87 Difference]: Start difference. First operand 235 states and 265 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:50:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:05,801 INFO L93 Difference]: Finished difference Result 234 states and 264 transitions. [2021-12-28 05:50:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:50:05,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-28 05:50:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:05,803 INFO L225 Difference]: With dead ends: 234 [2021-12-28 05:50:05,803 INFO L226 Difference]: Without dead ends: 234 [2021-12-28 05:50:05,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:50:05,806 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 0 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:05,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 453 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 72 Unchecked, 0.0s Time] [2021-12-28 05:50:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-28 05:50:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-12-28 05:50:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 135 states have (on average 1.7777777777777777) internal successors, (240), 219 states have internal predecessors, (240), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-28 05:50:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 264 transitions. [2021-12-28 05:50:05,834 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 264 transitions. Word has length 7 [2021-12-28 05:50:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:05,834 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 264 transitions. [2021-12-28 05:50:05,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:50:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 264 transitions. [2021-12-28 05:50:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 05:50:05,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:05,836 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:05,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:06,037 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,SelfDestructingSolverStorable2 [2021-12-28 05:50:06,037 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:06,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1116483670, now seen corresponding path program 1 times [2021-12-28 05:50:06,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:06,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870883987] [2021-12-28 05:50:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:06,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:06,060 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:06,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461411393] [2021-12-28 05:50:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:06,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:06,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:06,062 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) [2021-12-28 05:50:06,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 05:50:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-28 05:50:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:06,551 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:50:06,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 05:50:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-28 05:50:06,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:06,883 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-28 05:50:06,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-28 05:50:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-28 05:50:06,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:06,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870883987] [2021-12-28 05:50:06,963 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:06,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461411393] [2021-12-28 05:50:06,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461411393] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:50:06,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:50:06,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-28 05:50:06,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436353585] [2021-12-28 05:50:06,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:06,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:50:06,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:06,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:50:06,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:50:06,969 INFO L87 Difference]: Start difference. First operand 234 states and 264 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 05:50:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:15,571 INFO L93 Difference]: Finished difference Result 253 states and 288 transitions. [2021-12-28 05:50:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 05:50:15,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-12-28 05:50:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:15,574 INFO L225 Difference]: With dead ends: 253 [2021-12-28 05:50:15,574 INFO L226 Difference]: Without dead ends: 253 [2021-12-28 05:50:15,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-12-28 05:50:15,575 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 99 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:15,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1765 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 669 Invalid, 0 Unknown, 242 Unchecked, 0.4s Time] [2021-12-28 05:50:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-28 05:50:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 243. [2021-12-28 05:50:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 144 states have (on average 1.7361111111111112) internal successors, (250), 226 states have internal predecessors, (250), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-28 05:50:15,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 275 transitions. [2021-12-28 05:50:15,596 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 275 transitions. Word has length 73 [2021-12-28 05:50:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:15,598 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 275 transitions. [2021-12-28 05:50:15,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 05:50:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 275 transitions. [2021-12-28 05:50:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 05:50:15,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:15,603 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:15,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:15,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:15,820 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:15,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1116483669, now seen corresponding path program 1 times [2021-12-28 05:50:15,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:15,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3122813] [2021-12-28 05:50:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:15,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:15,839 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:15,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619825472] [2021-12-28 05:50:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:15,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:15,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:15,846 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) [2021-12-28 05:50:15,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 05:50:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-28 05:50:16,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:16,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-28 05:50:16,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:16,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-28 05:50:16,648 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 05:50:16,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 05:50:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-28 05:50:16,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:16,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3122813] [2021-12-28 05:50:16,802 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619825472] [2021-12-28 05:50:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619825472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:16,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:50:16,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-28 05:50:16,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175038874] [2021-12-28 05:50:16,803 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:16,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:50:16,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:50:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:50:16,804 INFO L87 Difference]: Start difference. First operand 243 states and 275 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 05:50:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:18,059 INFO L93 Difference]: Finished difference Result 343 states and 394 transitions. [2021-12-28 05:50:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 05:50:18,060 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2021-12-28 05:50:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:18,062 INFO L225 Difference]: With dead ends: 343 [2021-12-28 05:50:18,062 INFO L226 Difference]: Without dead ends: 343 [2021-12-28 05:50:18,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-28 05:50:18,063 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 112 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:18,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 777 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1188 Invalid, 0 Unknown, 755 Unchecked, 1.0s Time] [2021-12-28 05:50:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-28 05:50:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 242. [2021-12-28 05:50:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 144 states have (on average 1.7222222222222223) internal successors, (248), 225 states have internal predecessors, (248), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-28 05:50:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 273 transitions. [2021-12-28 05:50:18,071 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 273 transitions. Word has length 73 [2021-12-28 05:50:18,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:18,073 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 273 transitions. [2021-12-28 05:50:18,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 05:50:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 273 transitions. [2021-12-28 05:50:18,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 05:50:18,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:18,079 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:18,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:18,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:18,295 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1277004054, now seen corresponding path program 1 times [2021-12-28 05:50:18,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:18,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570224669] [2021-12-28 05:50:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:18,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:18,316 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:18,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389312543] [2021-12-28 05:50:18,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:18,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:18,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:18,337 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) [2021-12-28 05:50:18,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 05:50:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-28 05:50:18,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:18,765 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:50:18,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 05:50:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-28 05:50:18,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:19,002 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-28 05:50:19,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-28 05:50:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-28 05:50:19,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570224669] [2021-12-28 05:50:19,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389312543] [2021-12-28 05:50:19,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389312543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:50:19,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:50:19,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-28 05:50:19,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267277589] [2021-12-28 05:50:19,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:19,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:50:19,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:19,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:50:19,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:50:19,084 INFO L87 Difference]: Start difference. First operand 242 states and 273 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 05:50:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:27,563 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2021-12-28 05:50:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:50:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-12-28 05:50:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:27,565 INFO L225 Difference]: With dead ends: 256 [2021-12-28 05:50:27,566 INFO L226 Difference]: Without dead ends: 256 [2021-12-28 05:50:27,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:50:27,567 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 107 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:27,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1600 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 656 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2021-12-28 05:50:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-28 05:50:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 240. [2021-12-28 05:50:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 143 states have (on average 1.7202797202797202) internal successors, (246), 224 states have internal predecessors, (246), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-28 05:50:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 270 transitions. [2021-12-28 05:50:27,574 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 270 transitions. Word has length 74 [2021-12-28 05:50:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:27,575 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 270 transitions. [2021-12-28 05:50:27,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 05:50:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 270 transitions. [2021-12-28 05:50:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-28 05:50:27,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:27,583 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:27,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:27,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:27,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:27,809 INFO L85 PathProgramCache]: Analyzing trace with hash 801017355, now seen corresponding path program 1 times [2021-12-28 05:50:27,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:27,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597620002] [2021-12-28 05:50:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:27,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:27,830 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:27,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977908911] [2021-12-28 05:50:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:27,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:27,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:27,835 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) [2021-12-28 05:50:27,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 05:50:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:28,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-28 05:50:28,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:28,247 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:50:28,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 05:50:28,354 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:50:28,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 05:50:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-28 05:50:28,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:28,705 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-28 05:50:28,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-28 05:50:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-28 05:50:28,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:28,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597620002] [2021-12-28 05:50:28,751 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:28,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977908911] [2021-12-28 05:50:28,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977908911] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:50:28,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:50:28,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-12-28 05:50:28,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753095308] [2021-12-28 05:50:28,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:28,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 05:50:28,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 05:50:28,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:50:28,754 INFO L87 Difference]: Start difference. First operand 240 states and 270 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 05:50:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:29,342 INFO L93 Difference]: Finished difference Result 406 states and 471 transitions. [2021-12-28 05:50:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 05:50:29,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2021-12-28 05:50:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:29,345 INFO L225 Difference]: With dead ends: 406 [2021-12-28 05:50:29,345 INFO L226 Difference]: Without dead ends: 406 [2021-12-28 05:50:29,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:50:29,346 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 299 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:29,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 2009 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1003 Invalid, 0 Unknown, 311 Unchecked, 0.5s Time] [2021-12-28 05:50:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-12-28 05:50:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 264. [2021-12-28 05:50:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 164 states have (on average 1.6402439024390243) internal successors, (269), 244 states have internal predecessors, (269), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-28 05:50:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 297 transitions. [2021-12-28 05:50:29,359 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 297 transitions. Word has length 75 [2021-12-28 05:50:29,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:29,361 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 297 transitions. [2021-12-28 05:50:29,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 05:50:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 297 transitions. [2021-12-28 05:50:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-28 05:50:29,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:29,364 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:29,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:29,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:29,592 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:29,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash 801017356, now seen corresponding path program 1 times [2021-12-28 05:50:29,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:29,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688187660] [2021-12-28 05:50:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:29,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:29,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:29,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761392434] [2021-12-28 05:50:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:29,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:29,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:29,616 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) [2021-12-28 05:50:29,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 05:50:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-28 05:50:29,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:29,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-28 05:50:30,551 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 05:50:30,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-28 05:50:30,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-28 05:50:30,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:30,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-28 05:50:30,834 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-28 05:50:30,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:50:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-28 05:50:30,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:31,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:31,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688187660] [2021-12-28 05:50:31,032 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:31,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761392434] [2021-12-28 05:50:31,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761392434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:31,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:50:31,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-28 05:50:31,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920287359] [2021-12-28 05:50:31,033 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:31,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 05:50:31,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:31,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 05:50:31,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-28 05:50:31,034 INFO L87 Difference]: Start difference. First operand 264 states and 297 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 05:50:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:32,363 INFO L93 Difference]: Finished difference Result 365 states and 417 transitions. [2021-12-28 05:50:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:50:32,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2021-12-28 05:50:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:32,365 INFO L225 Difference]: With dead ends: 365 [2021-12-28 05:50:32,366 INFO L226 Difference]: Without dead ends: 365 [2021-12-28 05:50:32,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-12-28 05:50:32,367 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 114 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 988 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:32,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 828 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1182 Invalid, 0 Unknown, 988 Unchecked, 1.0s Time] [2021-12-28 05:50:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-28 05:50:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 264. [2021-12-28 05:50:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 164 states have (on average 1.6341463414634145) internal successors, (268), 244 states have internal predecessors, (268), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-28 05:50:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 296 transitions. [2021-12-28 05:50:32,376 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 296 transitions. Word has length 75 [2021-12-28 05:50:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:32,376 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 296 transitions. [2021-12-28 05:50:32,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 05:50:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 296 transitions. [2021-12-28 05:50:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 05:50:32,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:32,378 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:32,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-28 05:50:32,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:32,583 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:32,584 INFO L85 PathProgramCache]: Analyzing trace with hash -938265759, now seen corresponding path program 1 times [2021-12-28 05:50:32,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:32,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989592489] [2021-12-28 05:50:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:32,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:32,612 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:32,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304499959] [2021-12-28 05:50:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:32,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:32,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:32,614 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) [2021-12-28 05:50:32,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 05:50:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:32,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 05:50:32,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-28 05:50:32,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:32,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-28 05:50:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-28 05:50:33,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:33,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989592489] [2021-12-28 05:50:33,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:33,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304499959] [2021-12-28 05:50:33,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304499959] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:50:33,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:50:33,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-28 05:50:33,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505039675] [2021-12-28 05:50:33,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:33,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:50:33,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:50:33,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:50:33,055 INFO L87 Difference]: Start difference. First operand 264 states and 296 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 05:50:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:33,273 INFO L93 Difference]: Finished difference Result 282 states and 321 transitions. [2021-12-28 05:50:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:50:33,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2021-12-28 05:50:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:33,276 INFO L225 Difference]: With dead ends: 282 [2021-12-28 05:50:33,276 INFO L226 Difference]: Without dead ends: 282 [2021-12-28 05:50:33,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:50:33,277 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 317 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:33,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1533 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:50:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-28 05:50:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 263. [2021-12-28 05:50:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 164 states have (on average 1.6280487804878048) internal successors, (267), 243 states have internal predecessors, (267), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-28 05:50:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 295 transitions. [2021-12-28 05:50:33,285 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 295 transitions. Word has length 76 [2021-12-28 05:50:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:33,286 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 295 transitions. [2021-12-28 05:50:33,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 05:50:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 295 transitions. [2021-12-28 05:50:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-28 05:50:33,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:33,287 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:33,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:33,499 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,SelfDestructingSolverStorable8 [2021-12-28 05:50:33,499 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash 269737250, now seen corresponding path program 1 times [2021-12-28 05:50:33,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:33,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448934383] [2021-12-28 05:50:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:33,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:33,522 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:33,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050065425] [2021-12-28 05:50:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:33,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:33,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:33,530 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) [2021-12-28 05:50:33,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 05:50:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 05:50:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-28 05:50:33,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:50:33,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:33,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448934383] [2021-12-28 05:50:33,784 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050065425] [2021-12-28 05:50:33,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050065425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:50:33,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:50:33,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:50:33,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508446565] [2021-12-28 05:50:33,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:50:33,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:50:33,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:33,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:50:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:50:33,786 INFO L87 Difference]: Start difference. First operand 263 states and 295 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 05:50:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:33,887 INFO L93 Difference]: Finished difference Result 270 states and 306 transitions. [2021-12-28 05:50:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:50:33,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2021-12-28 05:50:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:33,889 INFO L225 Difference]: With dead ends: 270 [2021-12-28 05:50:33,889 INFO L226 Difference]: Without dead ends: 270 [2021-12-28 05:50:33,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:50:33,890 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 94 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:33,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 357 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:50:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-28 05:50:33,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 262. [2021-12-28 05:50:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 164 states have (on average 1.6219512195121952) internal successors, (266), 242 states have internal predecessors, (266), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-28 05:50:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 294 transitions. [2021-12-28 05:50:33,897 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 294 transitions. Word has length 78 [2021-12-28 05:50:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:33,898 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 294 transitions. [2021-12-28 05:50:33,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 05:50:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 294 transitions. [2021-12-28 05:50:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 05:50:33,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:33,899 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:33,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:34,120 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,SelfDestructingSolverStorable9 [2021-12-28 05:50:34,121 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash -88647287, now seen corresponding path program 1 times [2021-12-28 05:50:34,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:34,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864175861] [2021-12-28 05:50:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:34,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:34,134 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:34,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126784904] [2021-12-28 05:50:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:34,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:34,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:34,136 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) [2021-12-28 05:50:34,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 05:50:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:34,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-28 05:50:34,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:34,460 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 05:50:34,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-28 05:50:34,554 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 05:50:34,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-28 05:50:34,664 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:50:34,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 05:50:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-28 05:50:34,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:34,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864175861] [2021-12-28 05:50:34,894 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126784904] [2021-12-28 05:50:34,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126784904] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:34,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:50:34,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-28 05:50:34,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626840604] [2021-12-28 05:50:34,895 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:34,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:50:34,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:34,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:50:34,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:50:34,896 INFO L87 Difference]: Start difference. First operand 262 states and 294 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 05:50:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:39,419 INFO L93 Difference]: Finished difference Result 330 states and 376 transitions. [2021-12-28 05:50:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 05:50:39,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2021-12-28 05:50:39,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:39,421 INFO L225 Difference]: With dead ends: 330 [2021-12-28 05:50:39,421 INFO L226 Difference]: Without dead ends: 330 [2021-12-28 05:50:39,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:50:39,422 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 123 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:39,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 2002 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 757 Invalid, 0 Unknown, 368 Unchecked, 0.3s Time] [2021-12-28 05:50:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-28 05:50:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2021-12-28 05:50:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 292 states have internal predecessors, (324), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2021-12-28 05:50:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 367 transitions. [2021-12-28 05:50:39,431 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 367 transitions. Word has length 82 [2021-12-28 05:50:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:39,432 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 367 transitions. [2021-12-28 05:50:39,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 05:50:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 367 transitions. [2021-12-28 05:50:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 05:50:39,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:39,433 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:39,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:39,651 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,SelfDestructingSolverStorable10 [2021-12-28 05:50:39,651 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash -88647286, now seen corresponding path program 1 times [2021-12-28 05:50:39,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:39,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343036605] [2021-12-28 05:50:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:39,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:39,666 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:39,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305886905] [2021-12-28 05:50:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:39,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:39,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:39,668 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) [2021-12-28 05:50:39,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 05:50:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:39,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-28 05:50:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:39,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-28 05:50:40,690 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 05:50:40,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-28 05:50:40,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-28 05:50:40,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:40,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-28 05:50:40,997 INFO L353 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-28 05:50:41,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-28 05:50:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:41,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-28 05:50:41,273 INFO L353 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-28 05:50:41,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-28 05:50:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-28 05:50:41,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:41,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:41,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343036605] [2021-12-28 05:50:41,585 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:41,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305886905] [2021-12-28 05:50:41,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305886905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:41,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:50:41,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-28 05:50:41,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257860854] [2021-12-28 05:50:41,585 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:41,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 05:50:41,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 05:50:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-12-28 05:50:41,586 INFO L87 Difference]: Start difference. First operand 321 states and 367 transitions. Second operand has 17 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-28 05:50:43,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:43,037 INFO L93 Difference]: Finished difference Result 466 states and 540 transitions. [2021-12-28 05:50:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 05:50:43,038 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 82 [2021-12-28 05:50:43,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:43,040 INFO L225 Difference]: With dead ends: 466 [2021-12-28 05:50:43,041 INFO L226 Difference]: Without dead ends: 466 [2021-12-28 05:50:43,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-12-28 05:50:43,042 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 121 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 2293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1146 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:43,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 855 Invalid, 2293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1133 Invalid, 0 Unknown, 1146 Unchecked, 1.1s Time] [2021-12-28 05:50:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-12-28 05:50:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 343. [2021-12-28 05:50:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 235 states have (on average 1.476595744680851) internal successors, (347), 311 states have internal predecessors, (347), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (26), 22 states have call predecessors, (26), 21 states have call successors, (26) [2021-12-28 05:50:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 394 transitions. [2021-12-28 05:50:43,052 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 394 transitions. Word has length 82 [2021-12-28 05:50:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:43,052 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 394 transitions. [2021-12-28 05:50:43,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-28 05:50:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 394 transitions. [2021-12-28 05:50:43,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 05:50:43,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:43,053 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:43,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:43,278 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,SelfDestructingSolverStorable11 [2021-12-28 05:50:43,279 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:43,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:43,279 INFO L85 PathProgramCache]: Analyzing trace with hash -927383707, now seen corresponding path program 1 times [2021-12-28 05:50:43,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:43,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873907788] [2021-12-28 05:50:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:43,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:43,291 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:43,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373762650] [2021-12-28 05:50:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:43,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:43,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:43,293 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) [2021-12-28 05:50:43,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 05:50:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-28 05:50:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:43,659 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 05:50:43,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-28 05:50:43,776 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:50:43,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-28 05:50:43,906 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:50:43,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-28 05:50:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 05:50:43,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:44,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:44,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873907788] [2021-12-28 05:50:44,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:44,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373762650] [2021-12-28 05:50:44,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373762650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:44,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:50:44,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-28 05:50:44,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031019016] [2021-12-28 05:50:44,743 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:44,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 05:50:44,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 05:50:44,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-12-28 05:50:44,744 INFO L87 Difference]: Start difference. First operand 343 states and 394 transitions. Second operand has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 05:50:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:49,381 INFO L93 Difference]: Finished difference Result 402 states and 458 transitions. [2021-12-28 05:50:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 05:50:49,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2021-12-28 05:50:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:49,384 INFO L225 Difference]: With dead ends: 402 [2021-12-28 05:50:49,384 INFO L226 Difference]: Without dead ends: 402 [2021-12-28 05:50:49,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 81 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-12-28 05:50:49,386 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 214 mSDsluCounter, 2639 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:49,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 2868 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 839 Invalid, 0 Unknown, 924 Unchecked, 0.4s Time] [2021-12-28 05:50:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-28 05:50:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 328. [2021-12-28 05:50:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 222 states have (on average 1.4954954954954955) internal successors, (332), 299 states have internal predecessors, (332), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-28 05:50:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 370 transitions. [2021-12-28 05:50:49,395 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 370 transitions. Word has length 83 [2021-12-28 05:50:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:49,395 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 370 transitions. [2021-12-28 05:50:49,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 05:50:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 370 transitions. [2021-12-28 05:50:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 05:50:49,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:49,396 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:49,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:49,611 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,SelfDestructingSolverStorable12 [2021-12-28 05:50:49,611 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1546901432, now seen corresponding path program 1 times [2021-12-28 05:50:49,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:49,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150493926] [2021-12-28 05:50:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:49,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:49,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:49,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27501283] [2021-12-28 05:50:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:49,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:49,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:49,631 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) [2021-12-28 05:50:49,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 05:50:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:50:49,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-28 05:50:49,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:50:49,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:49,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150493926] [2021-12-28 05:50:49,911 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:49,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27501283] [2021-12-28 05:50:49,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27501283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:50:49,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:50:49,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:50:49,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627497629] [2021-12-28 05:50:49,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:50:49,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:50:49,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:50:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:50:49,913 INFO L87 Difference]: Start difference. First operand 328 states and 370 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 05:50:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:50,023 INFO L93 Difference]: Finished difference Result 341 states and 388 transitions. [2021-12-28 05:50:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:50:50,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 83 [2021-12-28 05:50:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:50,025 INFO L225 Difference]: With dead ends: 341 [2021-12-28 05:50:50,025 INFO L226 Difference]: Without dead ends: 341 [2021-12-28 05:50:50,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:50:50,026 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 161 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:50,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 527 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:50:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-28 05:50:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 327. [2021-12-28 05:50:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 222 states have (on average 1.490990990990991) internal successors, (331), 298 states have internal predecessors, (331), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-28 05:50:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 369 transitions. [2021-12-28 05:50:50,034 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 369 transitions. Word has length 83 [2021-12-28 05:50:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:50,034 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 369 transitions. [2021-12-28 05:50:50,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 05:50:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 369 transitions. [2021-12-28 05:50:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 05:50:50,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:50,035 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:50,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:50,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 05:50:50,243 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1546901433, now seen corresponding path program 1 times [2021-12-28 05:50:50,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382019340] [2021-12-28 05:50:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:50,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:50,258 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:50,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089911498] [2021-12-28 05:50:50,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:50,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:50,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:50,260 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) [2021-12-28 05:50:50,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 05:50:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:50,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-28 05:50:50,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:50,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:50:50,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-28 05:50:53,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:53,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-28 05:50:53,589 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 05:50:53,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-28 05:50:54,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:54,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-28 05:50:54,343 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-28 05:50:54,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:50:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-28 05:50:56,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:56,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:56,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382019340] [2021-12-28 05:50:56,699 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 05:50:56,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089911498] [2021-12-28 05:50:56,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089911498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:56,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:50:56,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-28 05:50:56,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713268017] [2021-12-28 05:50:56,700 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:56,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-28 05:50:56,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-28 05:50:56,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:50:56,701 INFO L87 Difference]: Start difference. First operand 327 states and 369 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 05:50:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:57,494 INFO L93 Difference]: Finished difference Result 510 states and 596 transitions. [2021-12-28 05:50:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 05:50:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2021-12-28 05:50:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:57,497 INFO L225 Difference]: With dead ends: 510 [2021-12-28 05:50:57,497 INFO L226 Difference]: Without dead ends: 510 [2021-12-28 05:50:57,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-12-28 05:50:57,498 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 115 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2095 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:57,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 953 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 2095 Unchecked, 0.2s Time] [2021-12-28 05:50:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-28 05:50:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 382. [2021-12-28 05:50:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 269 states have (on average 1.4349442379182156) internal successors, (386), 347 states have internal predecessors, (386), 23 states have call successors, (23), 9 states have call predecessors, (23), 13 states have return successors, (36), 25 states have call predecessors, (36), 23 states have call successors, (36) [2021-12-28 05:50:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 445 transitions. [2021-12-28 05:50:57,510 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 445 transitions. Word has length 83 [2021-12-28 05:50:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:57,510 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 445 transitions. [2021-12-28 05:50:57,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 05:50:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 445 transitions. [2021-12-28 05:50:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 05:50:57,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:57,511 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:57,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:57,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:57,726 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 83 more)] === [2021-12-28 05:50:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:57,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1315876189, now seen corresponding path program 1 times [2021-12-28 05:50:57,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:57,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341925922] [2021-12-28 05:50:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:57,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:57,747 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 05:50:57,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422619477] [2021-12-28 05:50:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:57,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:57,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:57,749 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) [2021-12-28 05:50:57,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 05:50:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:57,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-28 05:50:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:57,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:50:58,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9