./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:24:48,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:24:48,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:24:48,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:24:48,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:24:48,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:24:48,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:24:48,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:24:48,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:24:48,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:24:48,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:24:48,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:24:48,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:24:48,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:24:48,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:24:48,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:24:48,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:24:48,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:24:48,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:24:48,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:24:48,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:24:48,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:24:48,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:24:48,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:24:48,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:24:48,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:24:48,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:24:48,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:24:48,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:24:48,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:24:48,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:24:48,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:24:48,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:24:48,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:24:48,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:24:48,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:24:48,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:24:48,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:24:48,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:24:48,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:24:48,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:24:48,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:24:48,818 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:24:48,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:24:48,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:24:48,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:24:48,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:24:48,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:24:48,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:24:48,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:24:48,822 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:24:48,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:24:48,823 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:24:48,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:24:48,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:24:48,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:24:48,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:24:48,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:24:48,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:24:48,825 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:24:48,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:24:48,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:24:48,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:24:48,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:24:48,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:24:48,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:24:48,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:24:48,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:24:48,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:24:48,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:24:48,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:24:48,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:24:48,828 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:24:48,828 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:24:48,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:24:48,828 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 [2022-11-18 20:24:49,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:24:49,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:24:49,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:24:49,137 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:24:49,138 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:24:49,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-tiling/mbpr2.c [2022-11-18 20:24:49,201 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/data/6b4f6c399/8dd956864fc24f5d85834bd41e2fcb33/FLAG5ad2cb175 [2022-11-18 20:24:49,733 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:24:49,733 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/sv-benchmarks/c/array-tiling/mbpr2.c [2022-11-18 20:24:49,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/data/6b4f6c399/8dd956864fc24f5d85834bd41e2fcb33/FLAG5ad2cb175 [2022-11-18 20:24:50,098 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/data/6b4f6c399/8dd956864fc24f5d85834bd41e2fcb33 [2022-11-18 20:24:50,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:24:50,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:24:50,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:24:50,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:24:50,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:24:50,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306468a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50, skipping insertion in model container [2022-11-18 20:24:50,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:24:50,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:24:50,294 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2022-11-18 20:24:50,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:24:50,358 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:24:50,377 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2022-11-18 20:24:50,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:24:50,403 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:24:50,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50 WrapperNode [2022-11-18 20:24:50,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:24:50,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:24:50,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:24:50,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:24:50,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,440 INFO L138 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-11-18 20:24:50,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:24:50,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:24:50,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:24:50,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:24:50,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,465 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:24:50,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:24:50,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:24:50,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:24:50,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (1/1) ... [2022-11-18 20:24:50,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:24:50,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:50,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:24:50,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:24:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:24:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:24:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:24:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:24:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:24:50,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:24:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:24:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:24:50,656 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:24:50,658 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:24:50,873 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:24:50,880 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:24:50,880 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:24:50,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:24:50 BoogieIcfgContainer [2022-11-18 20:24:50,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:24:50,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:24:50,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:24:50,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:24:50,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:24:50" (1/3) ... [2022-11-18 20:24:50,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3033fc6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:24:50, skipping insertion in model container [2022-11-18 20:24:50,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:50" (2/3) ... [2022-11-18 20:24:50,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3033fc6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:24:50, skipping insertion in model container [2022-11-18 20:24:50,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:24:50" (3/3) ... [2022-11-18 20:24:50,892 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2022-11-18 20:24:50,913 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:24:50,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:24:50,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:24:50,974 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@95f07e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:24:50,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:24:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:24:50,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:50,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:50,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:24:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash -669443655, now seen corresponding path program 1 times [2022-11-18 20:24:51,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:51,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75710198] [2022-11-18 20:24:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:51,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:51,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75710198] [2022-11-18 20:24:51,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75710198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:51,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:51,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:24:51,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041716765] [2022-11-18 20:24:51,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:51,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:24:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:24:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:24:51,258 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:51,283 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2022-11-18 20:24:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:24:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 20:24:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:51,296 INFO L225 Difference]: With dead ends: 53 [2022-11-18 20:24:51,297 INFO L226 Difference]: Without dead ends: 24 [2022-11-18 20:24:51,300 INFO L412 NwaCegarLoop]: 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 [2022-11-18 20:24:51,305 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2022-11-18 20:24:51,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:24:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-18 20:24:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-18 20:24:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-18 20:24:51,351 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2022-11-18 20:24:51,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:51,352 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-18 20:24:51,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-18 20:24:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:24:51,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:51,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:51,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:24:51,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:24:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash -893920799, now seen corresponding path program 1 times [2022-11-18 20:24:51,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:51,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476606895] [2022-11-18 20:24:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:51,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:51,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:51,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476606895] [2022-11-18 20:24:51,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476606895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:51,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:51,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:24:51,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416162363] [2022-11-18 20:24:51,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:51,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:24:51,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:51,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:24:51,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:24:51,704 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:51,793 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-18 20:24:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:24:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 20:24:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:51,794 INFO L225 Difference]: With dead ends: 33 [2022-11-18 20:24:51,795 INFO L226 Difference]: Without dead ends: 31 [2022-11-18 20:24:51,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:24:51,796 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:51,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-18 20:24:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-11-18 20:24:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-18 20:24:51,802 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2022-11-18 20:24:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:51,803 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-18 20:24:51,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:51,803 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-18 20:24:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:24:51,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:51,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:51,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:24:51,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:24:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:51,805 INFO L85 PathProgramCache]: Analyzing trace with hash -893861217, now seen corresponding path program 1 times [2022-11-18 20:24:51,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:51,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615888435] [2022-11-18 20:24:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:51,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:52,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:52,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615888435] [2022-11-18 20:24:52,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615888435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:52,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:52,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:24:52,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138064129] [2022-11-18 20:24:52,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:52,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:24:52,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:24:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:24:52,223 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:52,297 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-11-18 20:24:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:24:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 20:24:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:52,299 INFO L225 Difference]: With dead ends: 50 [2022-11-18 20:24:52,299 INFO L226 Difference]: Without dead ends: 34 [2022-11-18 20:24:52,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:24:52,301 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 60 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:52,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 22 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-18 20:24:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-11-18 20:24:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-18 20:24:52,309 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2022-11-18 20:24:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:52,309 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-18 20:24:52,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-18 20:24:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 20:24:52,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:52,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:52,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:24:52,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:24:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash -815951211, now seen corresponding path program 1 times [2022-11-18 20:24:52,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:52,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983194447] [2022-11-18 20:24:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:52,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:24:52,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:52,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983194447] [2022-11-18 20:24:52,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983194447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:52,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:52,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:24:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487760513] [2022-11-18 20:24:52,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:24:52,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:24:52,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:24:52,483 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:52,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:52,520 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-11-18 20:24:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:24:52,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 20:24:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:52,524 INFO L225 Difference]: With dead ends: 43 [2022-11-18 20:24:52,524 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 20:24:52,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:24:52,526 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:52,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:24:52,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 20:24:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-18 20:24:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-18 20:24:52,533 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2022-11-18 20:24:52,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:52,534 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-18 20:24:52,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:52,534 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-18 20:24:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 20:24:52,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:52,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:52,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:24:52,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:24:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1208978221, now seen corresponding path program 1 times [2022-11-18 20:24:52,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:52,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600719184] [2022-11-18 20:24:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:52,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:53,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:53,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600719184] [2022-11-18 20:24:53,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600719184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:53,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121715491] [2022-11-18 20:24:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:53,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:53,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:24:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:24:53,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:53,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:24:53,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:24:53,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-18 20:24:53,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:24:53,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-18 20:24:53,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:24:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:53,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:54,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:24:54,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:24:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:24:54,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121715491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:54,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:54,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-18 20:24:54,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179577489] [2022-11-18 20:24:54,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:54,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:24:54,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:54,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:24:54,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:24:54,075 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:54,353 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-11-18 20:24:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:24:54,354 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 20:24:54,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:54,355 INFO L225 Difference]: With dead ends: 73 [2022-11-18 20:24:54,355 INFO L226 Difference]: Without dead ends: 52 [2022-11-18 20:24:54,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:24:54,357 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 174 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:54,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 76 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-18 20:24:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2022-11-18 20:24:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-18 20:24:54,365 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2022-11-18 20:24:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:54,365 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-18 20:24:54,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:54,366 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-18 20:24:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 20:24:54,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:54,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:54,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:54,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:54,573 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:24:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:54,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1368311994, now seen corresponding path program 1 times [2022-11-18 20:24:54,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:54,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768088124] [2022-11-18 20:24:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:54,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:24:55,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:55,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768088124] [2022-11-18 20:24:55,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768088124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:55,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672620851] [2022-11-18 20:24:55,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:55,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:55,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:55,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:24:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 20:24:55,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:55,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:24:55,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:24:55,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-18 20:24:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:24:55,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:55,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:24:55,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:24:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:24:55,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672620851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:55,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:55,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 18 [2022-11-18 20:24:55,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331346189] [2022-11-18 20:24:55,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:55,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:24:55,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:24:55,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:24:55,487 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:55,786 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-18 20:24:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:24:55,787 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-18 20:24:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:55,788 INFO L225 Difference]: With dead ends: 56 [2022-11-18 20:24:55,788 INFO L226 Difference]: Without dead ends: 54 [2022-11-18 20:24:55,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:24:55,789 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 107 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:55,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 95 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:24:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-18 20:24:55,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2022-11-18 20:24:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-11-18 20:24:55,797 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2022-11-18 20:24:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:55,798 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-11-18 20:24:55,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-11-18 20:24:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-18 20:24:55,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:55,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:55,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:56,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:24:56,005 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:24:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash 21305209, now seen corresponding path program 2 times [2022-11-18 20:24:56,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:56,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532060104] [2022-11-18 20:24:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:56,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:24:56,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532060104] [2022-11-18 20:24:56,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532060104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:56,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124514769] [2022-11-18 20:24:56,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:24:56,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:56,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:56,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:56,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:24:56,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:24:56,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:56,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:24:56,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:24:56,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:24:57,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124514769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:57,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:57,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-11-18 20:24:57,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484918793] [2022-11-18 20:24:57,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:57,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:24:57,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:57,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:24:57,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:24:57,065 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:57,435 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-11-18 20:24:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:24:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-18 20:24:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:57,438 INFO L225 Difference]: With dead ends: 97 [2022-11-18 20:24:57,440 INFO L226 Difference]: Without dead ends: 54 [2022-11-18 20:24:57,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:24:57,443 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 228 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:57,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 100 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:24:57,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-18 20:24:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2022-11-18 20:24:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-11-18 20:24:57,454 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2022-11-18 20:24:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:57,454 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-11-18 20:24:57,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-11-18 20:24:57,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 20:24:57,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:57,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:57,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:57,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:57,662 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:24:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1279882925, now seen corresponding path program 3 times [2022-11-18 20:24:57,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:57,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442403243] [2022-11-18 20:24:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:57,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:58,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:24:58,152 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:383) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:154) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:848) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:776) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:284) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-18 20:24:58,157 INFO L158 Benchmark]: Toolchain (without parser) took 8051.41ms. Allocated memory was 142.6MB in the beginning and 234.9MB in the end (delta: 92.3MB). Free memory was 112.2MB in the beginning and 200.7MB in the end (delta: -88.5MB). Peak memory consumption was 130.5MB. Max. memory is 16.1GB. [2022-11-18 20:24:58,157 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 81.8MB. Free memory was 37.2MB in the beginning and 37.2MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:24:58,157 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.49ms. Allocated memory is still 142.6MB. Free memory was 111.8MB in the beginning and 116.6MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:24:58,158 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.45ms. Allocated memory is still 142.6MB. Free memory was 116.6MB in the beginning and 114.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:24:58,158 INFO L158 Benchmark]: Boogie Preprocessor took 26.98ms. Allocated memory is still 142.6MB. Free memory was 114.9MB in the beginning and 113.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:24:58,158 INFO L158 Benchmark]: RCFGBuilder took 412.91ms. Allocated memory is still 142.6MB. Free memory was 113.6MB in the beginning and 101.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-18 20:24:58,159 INFO L158 Benchmark]: TraceAbstraction took 7270.96ms. Allocated memory was 142.6MB in the beginning and 234.9MB in the end (delta: 92.3MB). Free memory was 100.2MB in the beginning and 200.7MB in the end (delta: -100.5MB). Peak memory consumption was 121.1MB. Max. memory is 16.1GB. [2022-11-18 20:24:58,160 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 81.8MB. Free memory was 37.2MB in the beginning and 37.2MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.49ms. Allocated memory is still 142.6MB. Free memory was 111.8MB in the beginning and 116.6MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.45ms. Allocated memory is still 142.6MB. Free memory was 116.6MB in the beginning and 114.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.98ms. Allocated memory is still 142.6MB. Free memory was 114.9MB in the beginning and 113.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 412.91ms. Allocated memory is still 142.6MB. Free memory was 113.6MB in the beginning and 101.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7270.96ms. Allocated memory was 142.6MB in the beginning and 234.9MB in the end (delta: 92.3MB). Free memory was 100.2MB in the beginning and 200.7MB in the end (delta: -100.5MB). Peak memory consumption was 121.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-18 20:24:58,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:25:00,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:25:00,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:25:00,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:25:00,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:25:00,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:25:00,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:25:00,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:25:00,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:25:00,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:25:00,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:25:00,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:25:00,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:25:00,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:25:00,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:25:00,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:25:00,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:25:00,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:25:00,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:25:00,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:25:00,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:25:00,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:25:00,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:25:00,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:25:00,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:25:00,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:25:00,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:25:00,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:25:00,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:25:00,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:25:00,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:25:00,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:25:00,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:25:00,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:25:00,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:25:00,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:25:00,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:25:00,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:25:00,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:25:00,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:25:00,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:25:00,527 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-18 20:25:00,566 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:25:00,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:25:00,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:25:00,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:25:00,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:25:00,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:25:00,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:25:00,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:25:00,578 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:25:00,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:25:00,579 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:25:00,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:25:00,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:25:00,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:25:00,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:25:00,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:25:00,580 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:25:00,580 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 20:25:00,581 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 20:25:00,581 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:25:00,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:25:00,581 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:25:00,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:25:00,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:25:00,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:25:00,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:25:00,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:25:00,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:25:00,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:25:00,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:25:00,583 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 20:25:00,583 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 20:25:00,584 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:25:00,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:25:00,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:25:00,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 20:25:00,585 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 [2022-11-18 20:25:01,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:25:01,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:25:01,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:25:01,049 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:25:01,057 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:25:01,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-tiling/mbpr2.c [2022-11-18 20:25:01,127 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/data/6cb18a349/70a825f9ff264ee9a7f867fcdd42a7a8/FLAG2d2ff1a53 [2022-11-18 20:25:01,678 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:25:01,681 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/sv-benchmarks/c/array-tiling/mbpr2.c [2022-11-18 20:25:01,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/data/6cb18a349/70a825f9ff264ee9a7f867fcdd42a7a8/FLAG2d2ff1a53 [2022-11-18 20:25:02,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/data/6cb18a349/70a825f9ff264ee9a7f867fcdd42a7a8 [2022-11-18 20:25:02,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:25:02,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:25:02,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:25:02,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:25:02,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:25:02,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b304695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02, skipping insertion in model container [2022-11-18 20:25:02,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:25:02,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:25:02,209 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2022-11-18 20:25:02,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:25:02,241 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:25:02,276 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2022-11-18 20:25:02,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:25:02,326 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:25:02,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02 WrapperNode [2022-11-18 20:25:02,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:25:02,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:25:02,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:25:02,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:25:02,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,365 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 90 [2022-11-18 20:25:02,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:25:02,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:25:02,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:25:02,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:25:02,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,395 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:25:02,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:25:02,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:25:02,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:25:02,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (1/1) ... [2022-11-18 20:25:02,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:25:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:02,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:25:02,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:25:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:25:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 20:25:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:25:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 20:25:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:25:02,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:25:02,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 20:25:02,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:25:02,569 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:25:02,572 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:25:02,917 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:25:02,923 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:25:02,941 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:25:02,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:25:02 BoogieIcfgContainer [2022-11-18 20:25:02,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:25:02,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:25:02,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:25:02,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:25:02,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:25:02" (1/3) ... [2022-11-18 20:25:02,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e31adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:25:02, skipping insertion in model container [2022-11-18 20:25:02,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:02" (2/3) ... [2022-11-18 20:25:02,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e31adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:25:02, skipping insertion in model container [2022-11-18 20:25:02,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:25:02" (3/3) ... [2022-11-18 20:25:02,972 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2022-11-18 20:25:02,994 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:25:02,995 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:25:03,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:25:03,084 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@37dcff19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:25:03,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:25:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:25:03,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:03,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:03,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:03,107 INFO L85 PathProgramCache]: Analyzing trace with hash -669443655, now seen corresponding path program 1 times [2022-11-18 20:25:03,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:03,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990491639] [2022-11-18 20:25:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:03,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:03,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:03,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:03,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 20:25:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:03,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 20:25:03,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:03,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:25:03,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:03,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990491639] [2022-11-18 20:25:03,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990491639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:25:03,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:25:03,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:25:03,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974612693] [2022-11-18 20:25:03,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:25:03,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:25:03,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:25:03,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:25:03,326 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:03,350 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2022-11-18 20:25:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:25:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 20:25:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:03,363 INFO L225 Difference]: With dead ends: 53 [2022-11-18 20:25:03,363 INFO L226 Difference]: Without dead ends: 24 [2022-11-18 20:25:03,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:25:03,370 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2022-11-18 20:25:03,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:25:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-18 20:25:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-18 20:25:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-18 20:25:03,417 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2022-11-18 20:25:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:03,418 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-18 20:25:03,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-18 20:25:03,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:25:03,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:03,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:03,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:03,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:03,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:03,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:03,635 INFO L85 PathProgramCache]: Analyzing trace with hash -893920799, now seen corresponding path program 1 times [2022-11-18 20:25:03,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:03,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497603961] [2022-11-18 20:25:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:03,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:03,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:03,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:03,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 20:25:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:25:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:03,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:25:03,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:03,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497603961] [2022-11-18 20:25:03,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497603961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:25:03,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:25:03,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:25:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109846840] [2022-11-18 20:25:03,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:25:03,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:25:03,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:03,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:25:03,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:25:03,872 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:04,153 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-18 20:25:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:25:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 20:25:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:04,155 INFO L225 Difference]: With dead ends: 46 [2022-11-18 20:25:04,156 INFO L226 Difference]: Without dead ends: 32 [2022-11-18 20:25:04,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:25:04,157 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:04,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 22 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:25:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-18 20:25:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-11-18 20:25:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-18 20:25:04,165 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2022-11-18 20:25:04,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:04,165 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-18 20:25:04,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-18 20:25:04,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 20:25:04,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:04,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:04,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:04,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:04,379 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:04,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:04,380 INFO L85 PathProgramCache]: Analyzing trace with hash -816010793, now seen corresponding path program 1 times [2022-11-18 20:25:04,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:04,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226621555] [2022-11-18 20:25:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:04,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:04,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:04,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:04,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 20:25:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:25:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:04,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:25:04,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:04,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226621555] [2022-11-18 20:25:04,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226621555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:25:04,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:25:04,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:25:04,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569890484] [2022-11-18 20:25:04,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:25:04,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:25:04,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:04,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:25:04,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:25:04,587 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:04,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:04,610 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-18 20:25:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:25:04,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 20:25:04,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:04,612 INFO L225 Difference]: With dead ends: 39 [2022-11-18 20:25:04,612 INFO L226 Difference]: Without dead ends: 26 [2022-11-18 20:25:04,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:25:04,614 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:04,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:25:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-18 20:25:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-18 20:25:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-18 20:25:04,621 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 23 [2022-11-18 20:25:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:04,621 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-18 20:25:04,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-18 20:25:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 20:25:04,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:04,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:04,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:04,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:04,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1209037803, now seen corresponding path program 1 times [2022-11-18 20:25:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:04,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163740402] [2022-11-18 20:25:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:04,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:04,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:04,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:04,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 20:25:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:25:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:25:04,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:25:04,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:04,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163740402] [2022-11-18 20:25:04,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163740402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:25:04,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:25:04,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:25:04,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909470978] [2022-11-18 20:25:04,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:25:04,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:25:04,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:04,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:25:04,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:25:04,971 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:05,025 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-11-18 20:25:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:25:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 20:25:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:05,030 INFO L225 Difference]: With dead ends: 36 [2022-11-18 20:25:05,031 INFO L226 Difference]: Without dead ends: 34 [2022-11-18 20:25:05,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:25:05,035 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:05,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 76 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:25:05,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-18 20:25:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-11-18 20:25:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-18 20:25:05,052 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2022-11-18 20:25:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:05,052 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-18 20:25:05,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:05,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-18 20:25:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 20:25:05,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:05,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:05,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:05,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:05,267 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:05,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:05,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1208978221, now seen corresponding path program 1 times [2022-11-18 20:25:05,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:05,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31231171] [2022-11-18 20:25:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:05,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:05,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:05,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:05,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 20:25:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:05,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:25:05,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:05,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:25:05,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:05,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-18 20:25:05,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:25:05,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-18 20:25:05,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:25:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:05,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:06,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-18 20:25:06,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-18 20:25:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:06,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:06,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31231171] [2022-11-18 20:25:06,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31231171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:06,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:25:06,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-18 20:25:06,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086070535] [2022-11-18 20:25:06,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:06,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:25:06,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:06,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:25:06,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:25:06,270 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:06,932 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-11-18 20:25:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:25:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 20:25:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:06,934 INFO L225 Difference]: With dead ends: 73 [2022-11-18 20:25:06,934 INFO L226 Difference]: Without dead ends: 52 [2022-11-18 20:25:06,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:25:06,936 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 105 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:06,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 69 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:25:06,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-18 20:25:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2022-11-18 20:25:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-18 20:25:06,944 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2022-11-18 20:25:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:06,944 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-18 20:25:06,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:06,945 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-18 20:25:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 20:25:06,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:06,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:06,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:07,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:07,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:07,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1368311994, now seen corresponding path program 1 times [2022-11-18 20:25:07,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:07,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183708525] [2022-11-18 20:25:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:07,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:07,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:07,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:07,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 20:25:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:07,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:25:07,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:07,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:25:07,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:07,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-18 20:25:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:07,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:07,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:25:07,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:25:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:07,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:07,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183708525] [2022-11-18 20:25:07,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183708525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:07,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:25:07,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-18 20:25:07,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890861086] [2022-11-18 20:25:07,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:07,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:25:07,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:07,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:25:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:25:07,884 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:08,596 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-18 20:25:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:25:08,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-18 20:25:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:08,598 INFO L225 Difference]: With dead ends: 56 [2022-11-18 20:25:08,598 INFO L226 Difference]: Without dead ends: 54 [2022-11-18 20:25:08,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:25:08,599 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:08,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 97 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:25:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-18 20:25:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2022-11-18 20:25:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-11-18 20:25:08,608 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2022-11-18 20:25:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:08,608 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-11-18 20:25:08,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-11-18 20:25:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-18 20:25:08,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:08,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:08,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:08,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:08,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash 21305209, now seen corresponding path program 2 times [2022-11-18 20:25:08,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:08,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820508032] [2022-11-18 20:25:08,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:25:08,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:08,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:08,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:08,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-18 20:25:08,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:25:08,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:08,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:25:08,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:12,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:13,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:13,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820508032] [2022-11-18 20:25:13,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820508032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:13,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:25:13,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-11-18 20:25:13,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532629332] [2022-11-18 20:25:13,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:13,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:25:13,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:25:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:25:13,984 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:15,984 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-11-18 20:25:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:25:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-18 20:25:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:15,989 INFO L225 Difference]: With dead ends: 97 [2022-11-18 20:25:15,989 INFO L226 Difference]: Without dead ends: 54 [2022-11-18 20:25:15,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:25:15,990 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 238 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:15,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 85 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 20:25:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-18 20:25:16,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2022-11-18 20:25:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-11-18 20:25:16,004 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2022-11-18 20:25:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:16,004 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-11-18 20:25:16,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-11-18 20:25:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 20:25:16,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:16,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:16,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:16,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:16,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1279882925, now seen corresponding path program 3 times [2022-11-18 20:25:16,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:16,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191444607] [2022-11-18 20:25:16,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:25:16,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:16,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:16,222 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:16,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-18 20:25:16,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:25:16,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:16,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:25:16,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:16,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:25:16,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:25:16,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:16,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:25:16,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:25:16,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:25:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:25:16,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:17,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:25:17,489 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 58 [2022-11-18 20:25:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:25:17,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:17,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191444607] [2022-11-18 20:25:17,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191444607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:17,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:25:17,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-11-18 20:25:17,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101397275] [2022-11-18 20:25:17,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:17,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:25:17,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:17,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:25:17,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:25:17,598 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:18,301 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2022-11-18 20:25:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:25:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-18 20:25:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:18,303 INFO L225 Difference]: With dead ends: 108 [2022-11-18 20:25:18,303 INFO L226 Difference]: Without dead ends: 98 [2022-11-18 20:25:18,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:25:18,304 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 83 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:18,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 173 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-18 20:25:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-18 20:25:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2022-11-18 20:25:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-11-18 20:25:18,321 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 43 [2022-11-18 20:25:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:18,322 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-11-18 20:25:18,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-11-18 20:25:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 20:25:18,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:18,323 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:18,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:18,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:18,527 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:18,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash 886855915, now seen corresponding path program 4 times [2022-11-18 20:25:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:18,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319866709] [2022-11-18 20:25:18,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:25:18,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:18,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:18,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:18,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-18 20:25:18,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:25:18,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:18,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:25:18,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:18,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:25:18,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:25:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:18,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:25:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:18,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:25:19,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:25:19,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-18 20:25:19,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:25:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:19,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:20,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:25:20,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:25:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:25:20,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:20,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319866709] [2022-11-18 20:25:20,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319866709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:20,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:25:20,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-11-18 20:25:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902026700] [2022-11-18 20:25:20,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:20,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:25:20,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:25:20,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:25:20,312 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:21,206 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-11-18 20:25:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:25:21,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-18 20:25:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:21,208 INFO L225 Difference]: With dead ends: 88 [2022-11-18 20:25:21,208 INFO L226 Difference]: Without dead ends: 78 [2022-11-18 20:25:21,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:25:21,209 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 182 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:21,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 118 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 232 Invalid, 0 Unknown, 30 Unchecked, 0.6s Time] [2022-11-18 20:25:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-18 20:25:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2022-11-18 20:25:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2022-11-18 20:25:21,247 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 43 [2022-11-18 20:25:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:21,248 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2022-11-18 20:25:21,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2022-11-18 20:25:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:25:21,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:21,250 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:21,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:21,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:21,462 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:21,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:21,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1854428834, now seen corresponding path program 5 times [2022-11-18 20:25:21,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:21,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449724405] [2022-11-18 20:25:21,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:25:21,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:21,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:21,465 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:21,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-18 20:25:21,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:25:21,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:25:21,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:21,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:25:21,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:25:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:22,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:22,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:25:22,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:25:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:25:22,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449724405] [2022-11-18 20:25:22,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449724405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:22,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:25:22,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-11-18 20:25:22,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385971188] [2022-11-18 20:25:22,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:22,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:25:22,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:22,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:25:22,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:25:22,582 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:25,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:25:26,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:26,104 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2022-11-18 20:25:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:25:26,105 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-18 20:25:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:26,106 INFO L225 Difference]: With dead ends: 101 [2022-11-18 20:25:26,106 INFO L226 Difference]: Without dead ends: 99 [2022-11-18 20:25:26,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:25:26,107 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 250 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:26,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 171 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 486 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-18 20:25:26,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-18 20:25:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2022-11-18 20:25:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-11-18 20:25:26,122 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 49 [2022-11-18 20:25:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:26,122 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-11-18 20:25:26,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-11-18 20:25:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 20:25:26,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:26,124 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:26,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-11-18 20:25:26,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:26,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2084333679, now seen corresponding path program 6 times [2022-11-18 20:25:26,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:26,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561272060] [2022-11-18 20:25:26,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:25:26,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:26,337 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:26,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-18 20:25:26,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-18 20:25:26,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:26,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:25:26,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:25:32,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:25:37,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:37,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561272060] [2022-11-18 20:25:37,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561272060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:37,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:25:37,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2022-11-18 20:25:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861869289] [2022-11-18 20:25:37,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:37,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:25:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:25:37,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:25:37,111 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:42,614 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2022-11-18 20:25:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:25:42,618 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-18 20:25:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:42,619 INFO L225 Difference]: With dead ends: 164 [2022-11-18 20:25:42,619 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 20:25:42,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:25:42,621 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 302 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:42,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 183 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-18 20:25:42,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 20:25:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-11-18 20:25:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-11-18 20:25:42,635 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 55 [2022-11-18 20:25:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:42,635 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-11-18 20:25:42,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-11-18 20:25:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 20:25:42,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:42,636 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:42,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:42,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:42,845 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:42,845 INFO L85 PathProgramCache]: Analyzing trace with hash 419308485, now seen corresponding path program 7 times [2022-11-18 20:25:42,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:42,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459287104] [2022-11-18 20:25:42,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:25:42,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:42,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:42,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:42,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-18 20:25:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:43,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:25:43,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:43,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:25:43,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:25:43,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:25:43,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:25:43,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:25:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:25:43,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:44,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:25:44,695 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 58 [2022-11-18 20:25:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 20:25:44,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:44,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459287104] [2022-11-18 20:25:44,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459287104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:44,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:25:44,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2022-11-18 20:25:44,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004582466] [2022-11-18 20:25:44,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:44,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:25:44,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:44,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:25:44,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:25:44,879 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:46,132 INFO L93 Difference]: Finished difference Result 153 states and 166 transitions. [2022-11-18 20:25:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:25:46,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-18 20:25:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:46,142 INFO L225 Difference]: With dead ends: 153 [2022-11-18 20:25:46,142 INFO L226 Difference]: Without dead ends: 143 [2022-11-18 20:25:46,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:25:46,143 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 155 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:46,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 254 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 337 Invalid, 0 Unknown, 82 Unchecked, 0.7s Time] [2022-11-18 20:25:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-18 20:25:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2022-11-18 20:25:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2022-11-18 20:25:46,167 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 63 [2022-11-18 20:25:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:46,169 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2022-11-18 20:25:46,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2022-11-18 20:25:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 20:25:46,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:46,174 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:46,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-18 20:25:46,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:46,386 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash 26281475, now seen corresponding path program 8 times [2022-11-18 20:25:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:46,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331513460] [2022-11-18 20:25:46,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:25:46,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:46,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:46,388 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:46,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-18 20:25:46,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:25:46,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:46,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:25:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:46,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:25:46,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:25:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:46,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:25:46,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:46,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:25:46,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:46,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:25:47,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:47,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:25:47,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:25:47,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-18 20:25:47,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:25:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:47,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:49,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:25:49,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:25:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:25:49,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:25:49,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331513460] [2022-11-18 20:25:49,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331513460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:49,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:25:49,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2022-11-18 20:25:49,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081556298] [2022-11-18 20:25:49,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:49,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:25:49,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:25:49,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:25:49,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:25:49,670 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 26 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:52,716 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2022-11-18 20:25:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 20:25:52,717 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 26 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-18 20:25:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:52,718 INFO L225 Difference]: With dead ends: 173 [2022-11-18 20:25:52,718 INFO L226 Difference]: Without dead ends: 163 [2022-11-18 20:25:52,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:25:52,720 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 245 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:52,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 347 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 594 Invalid, 0 Unknown, 167 Unchecked, 1.3s Time] [2022-11-18 20:25:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-18 20:25:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 108. [2022-11-18 20:25:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0841121495327102) internal successors, (116), 107 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2022-11-18 20:25:52,742 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 63 [2022-11-18 20:25:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:52,743 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2022-11-18 20:25:52,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 26 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2022-11-18 20:25:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 20:25:52,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:52,745 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:52,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:52,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:52,958 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1832115082, now seen corresponding path program 9 times [2022-11-18 20:25:52,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:25:52,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41755350] [2022-11-18 20:25:52,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:25:52,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:25:52,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:25:52,961 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:25:52,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-18 20:25:53,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:25:53,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 20:25:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:56,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:25:57,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:25:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:59,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:04,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:26:04,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:26:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:26:08,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:26:08,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41755350] [2022-11-18 20:26:08,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41755350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:08,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:26:08,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 37 [2022-11-18 20:26:08,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023278127] [2022-11-18 20:26:08,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:08,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:26:08,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:26:08,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:26:08,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:26:08,841 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:35,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:26:37,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:26:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:53,853 INFO L93 Difference]: Finished difference Result 288 states and 312 transitions. [2022-11-18 20:26:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-18 20:26:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-18 20:26:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:53,854 INFO L225 Difference]: With dead ends: 288 [2022-11-18 20:26:53,855 INFO L226 Difference]: Without dead ends: 222 [2022-11-18 20:26:53,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=1605, Invalid=10385, Unknown=0, NotChecked=0, Total=11990 [2022-11-18 20:26:53,858 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 920 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 196 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:53,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 458 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1668 Invalid, 2 Unknown, 0 Unchecked, 12.8s Time] [2022-11-18 20:26:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-18 20:26:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 132. [2022-11-18 20:26:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.083969465648855) internal successors, (142), 131 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2022-11-18 20:26:53,888 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 69 [2022-11-18 20:26:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:53,888 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2022-11-18 20:26:53,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2022-11-18 20:26:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-18 20:26:53,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:53,890 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:53,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:54,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:26:54,091 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:54,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:54,091 INFO L85 PathProgramCache]: Analyzing trace with hash -903520087, now seen corresponding path program 10 times [2022-11-18 20:26:54,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:26:54,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485099472] [2022-11-18 20:26:54,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:26:54,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:26:54,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:26:54,094 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:26:54,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-18 20:26:54,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:26:54,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:26:54,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 18 proven. 111 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:27:05,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 18 proven. 111 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:27:14,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:27:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485099472] [2022-11-18 20:27:14,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485099472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:14,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:27:14,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2022-11-18 20:27:14,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689788714] [2022-11-18 20:27:14,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:14,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:27:14,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:27:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:27:14,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:27:14,447 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 32 states, 32 states have (on average 4.0) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:24,870 INFO L93 Difference]: Finished difference Result 174 states and 186 transitions. [2022-11-18 20:27:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:27:24,875 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.0) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-18 20:27:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:24,876 INFO L225 Difference]: With dead ends: 174 [2022-11-18 20:27:24,876 INFO L226 Difference]: Without dead ends: 112 [2022-11-18 20:27:24,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:27:24,878 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 415 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:24,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 352 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-18 20:27:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-18 20:27:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-11-18 20:27:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0833333333333333) internal successors, (117), 108 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2022-11-18 20:27:24,896 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 75 [2022-11-18 20:27:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:24,897 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2022-11-18 20:27:24,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.0) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2022-11-18 20:27:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 20:27:24,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:24,898 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:24,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:25,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:27:25,103 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash 67113375, now seen corresponding path program 11 times [2022-11-18 20:27:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:27:25,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278580161] [2022-11-18 20:27:25,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:27:25,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:27:25,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:27:25,106 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:27:25,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-18 20:27:25,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-18 20:27:25,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 20:27:25,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:25,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:27:25,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:27:25,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:25,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:27:25,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:25,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:27:26,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:26,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:27:26,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:26,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:27:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:26,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:27:26,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:26,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:27:26,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:27:26,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-18 20:27:27,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:27:27,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2022-11-18 20:27:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 12 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:27,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:39,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:27:39,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:27:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 28 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:40,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:27:40,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278580161] [2022-11-18 20:27:40,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278580161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:40,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:27:40,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 31] total 49 [2022-11-18 20:27:40,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650586664] [2022-11-18 20:27:40,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:40,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 20:27:40,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:27:40,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 20:27:40,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 20:27:40,051 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 49 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 49 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:27:46,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:27:48,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:27:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:59,247 INFO L93 Difference]: Finished difference Result 303 states and 327 transitions. [2022-11-18 20:27:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-18 20:27:59,247 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 49 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-18 20:27:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:59,248 INFO L225 Difference]: With dead ends: 303 [2022-11-18 20:27:59,248 INFO L226 Difference]: Without dead ends: 293 [2022-11-18 20:27:59,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 132 SyntacticMatches, 6 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3932 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1268, Invalid=10288, Unknown=0, NotChecked=0, Total=11556 [2022-11-18 20:27:59,253 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 502 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 96 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 568 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:59,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 569 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1246 Invalid, 3 Unknown, 568 Unchecked, 8.9s Time] [2022-11-18 20:27:59,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-18 20:27:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 182. [2022-11-18 20:27:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0939226519337018) internal successors, (198), 181 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 198 transitions. [2022-11-18 20:27:59,285 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 198 transitions. Word has length 83 [2022-11-18 20:27:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:59,286 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 198 transitions. [2022-11-18 20:27:59,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 49 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 198 transitions. [2022-11-18 20:27:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-18 20:27:59,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:59,287 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:59,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:59,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:27:59,488 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1769330854, now seen corresponding path program 12 times [2022-11-18 20:27:59,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:27:59,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802175170] [2022-11-18 20:27:59,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:27:59,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:27:59,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:27:59,490 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:27:59,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-18 20:27:59,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 20:27:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:27:59,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 17 proven. 56 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-18 20:28:03,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-18 20:28:14,353 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:28:14,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802175170] [2022-11-18 20:28:14,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802175170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:14,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:28:14,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2022-11-18 20:28:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94773272] [2022-11-18 20:28:14,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:14,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:28:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:28:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:28:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:28:14,356 INFO L87 Difference]: Start difference. First operand 182 states and 198 transitions. Second operand has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:30,919 INFO L93 Difference]: Finished difference Result 263 states and 286 transitions. [2022-11-18 20:28:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 20:28:30,922 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-11-18 20:28:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:30,922 INFO L225 Difference]: With dead ends: 263 [2022-11-18 20:28:30,922 INFO L226 Difference]: Without dead ends: 165 [2022-11-18 20:28:30,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=393, Invalid=1413, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:28:30,924 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 337 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:30,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 155 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-18 20:28:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-18 20:28:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2022-11-18 20:28:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0743243243243243) internal successors, (159), 148 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 159 transitions. [2022-11-18 20:28:30,952 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 159 transitions. Word has length 87 [2022-11-18 20:28:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:30,952 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 159 transitions. [2022-11-18 20:28:30,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:30,953 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 159 transitions. [2022-11-18 20:28:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 20:28:30,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:30,953 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:30,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:31,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:28:31,154 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:31,154 INFO L85 PathProgramCache]: Analyzing trace with hash -422376686, now seen corresponding path program 13 times [2022-11-18 20:28:31,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:28:31,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437672388] [2022-11-18 20:28:31,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:28:31,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:28:31,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:28:31,156 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:28:31,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-18 20:28:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:31,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:28:31,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:31,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:28:31,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:28:31,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:31,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:28:31,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:31,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:28:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:31,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:28:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:31,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:28:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:31,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:28:31,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:28:32,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:28:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-18 20:28:32,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:45,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-11-18 20:28:45,256 INFO L350 Elim1Store]: Elim1 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 2670 treesize of output 2638 [2022-11-18 20:28:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-18 20:28:45,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:28:45,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437672388] [2022-11-18 20:28:45,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437672388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:45,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:28:45,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2022-11-18 20:28:45,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101896518] [2022-11-18 20:28:45,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:45,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:28:45,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:28:45,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:28:45,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:28:45,546 INFO L87 Difference]: Start difference. First operand 149 states and 159 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:47,683 INFO L93 Difference]: Finished difference Result 232 states and 249 transitions. [2022-11-18 20:28:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:28:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-18 20:28:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:47,686 INFO L225 Difference]: With dead ends: 232 [2022-11-18 20:28:47,686 INFO L226 Difference]: Without dead ends: 168 [2022-11-18 20:28:47,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:28:47,687 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 119 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:47,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 129 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 184 Invalid, 0 Unknown, 86 Unchecked, 0.6s Time] [2022-11-18 20:28:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-18 20:28:47,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2022-11-18 20:28:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0608108108108107) internal successors, (157), 148 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 157 transitions. [2022-11-18 20:28:47,714 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 157 transitions. Word has length 89 [2022-11-18 20:28:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:47,715 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 157 transitions. [2022-11-18 20:28:47,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 157 transitions. [2022-11-18 20:28:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 20:28:47,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:47,716 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:47,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:47,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:28:47,931 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1794183984, now seen corresponding path program 14 times [2022-11-18 20:28:47,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:28:47,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080193232] [2022-11-18 20:28:47,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:28:47,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:28:47,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:28:47,933 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:28:47,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-18 20:28:48,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:28:48,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:48,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:28:48,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:48,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:28:48,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:28:48,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:28:48,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:28:49,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:28:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 74 proven. 120 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:28:49,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:51,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:28:51,475 INFO L350 Elim1Store]: Elim1 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 138 treesize of output 130 [2022-11-18 20:28:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 74 proven. 98 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 20:28:51,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:28:51,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080193232] [2022-11-18 20:28:51,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080193232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:51,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:28:51,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2022-11-18 20:28:51,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614800896] [2022-11-18 20:28:51,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:51,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:28:51,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:28:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:28:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:28:51,891 INFO L87 Difference]: Start difference. First operand 149 states and 157 transitions. Second operand has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:54,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:54,659 INFO L93 Difference]: Finished difference Result 257 states and 273 transitions. [2022-11-18 20:28:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 20:28:54,660 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-18 20:28:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:54,661 INFO L225 Difference]: With dead ends: 257 [2022-11-18 20:28:54,661 INFO L226 Difference]: Without dead ends: 241 [2022-11-18 20:28:54,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:28:54,663 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 200 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:54,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 438 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 773 Invalid, 0 Unknown, 83 Unchecked, 2.0s Time] [2022-11-18 20:28:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-18 20:28:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 190. [2022-11-18 20:28:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0582010582010581) internal successors, (200), 189 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 200 transitions. [2022-11-18 20:28:54,703 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 200 transitions. Word has length 89 [2022-11-18 20:28:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:54,703 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 200 transitions. [2022-11-18 20:28:54,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 200 transitions. [2022-11-18 20:28:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 20:28:54,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:54,704 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:54,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:54,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:28:54,911 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:54,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1479714958, now seen corresponding path program 15 times [2022-11-18 20:28:54,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:28:54,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441090264] [2022-11-18 20:28:54,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:28:54,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:28:54,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:28:54,913 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:28:54,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-18 20:28:55,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 20:28:55,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:55,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-18 20:28:55,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:55,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:28:55,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:28:55,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:28:55,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:28:55,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:55,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:28:55,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:55,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:28:55,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:55,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-18 20:28:56,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:56,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2022-11-18 20:28:56,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,319 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:56,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2022-11-18 20:28:56,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:28:56,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:56,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 38 [2022-11-18 20:28:56,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:56,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2022-11-18 20:28:56,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:56,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2022-11-18 20:28:56,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:56,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2022-11-18 20:28:56,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:56,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2022-11-18 20:28:56,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:56,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:56,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2022-11-18 20:28:57,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:57,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:57,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:57,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2022-11-18 20:28:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:59,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 2 proven. 180 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:29:20,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:29:20,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441090264] [2022-11-18 20:29:20,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441090264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:20,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:29:20,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2022-11-18 20:29:20,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284521721] [2022-11-18 20:29:20,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:20,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 20:29:20,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:29:20,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 20:29:20,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1968, Unknown=3, NotChecked=0, Total=2256 [2022-11-18 20:29:20,857 INFO L87 Difference]: Start difference. First operand 190 states and 200 transitions. Second operand has 48 states, 48 states have (on average 3.3958333333333335) internal successors, (163), 48 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:25,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:29:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:42,829 INFO L93 Difference]: Finished difference Result 324 states and 345 transitions. [2022-11-18 20:29:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-18 20:29:42,829 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.3958333333333335) internal successors, (163), 48 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-18 20:29:42,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:42,830 INFO L225 Difference]: With dead ends: 324 [2022-11-18 20:29:42,831 INFO L226 Difference]: Without dead ends: 314 [2022-11-18 20:29:42,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 132 SyntacticMatches, 8 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5650 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=1821, Invalid=14946, Unknown=3, NotChecked=0, Total=16770 [2022-11-18 20:29:42,835 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 833 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 152 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 730 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:42,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 576 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1392 Invalid, 1 Unknown, 730 Unchecked, 7.1s Time] [2022-11-18 20:29:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-18 20:29:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 249. [2022-11-18 20:29:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0564516129032258) internal successors, (262), 248 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 262 transitions. [2022-11-18 20:29:42,896 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 262 transitions. Word has length 89 [2022-11-18 20:29:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:42,897 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 262 transitions. [2022-11-18 20:29:42,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.3958333333333335) internal successors, (163), 48 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 262 transitions. [2022-11-18 20:29:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-18 20:29:42,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:42,899 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:42,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-18 20:29:43,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:29:43,113 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1601496303, now seen corresponding path program 16 times [2022-11-18 20:29:43,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:29:43,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767173806] [2022-11-18 20:29:43,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:29:43,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:29:43,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:29:43,115 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:29:43,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-18 20:29:43,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:29:43,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:29:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:43,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:29:43,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:29:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:43,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:29:43,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:43,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:29:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:43,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:29:43,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:43,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:29:44,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:44,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:29:44,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:29:44,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:29:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 66 proven. 86 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-18 20:29:44,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:55,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-11-18 20:29:55,782 INFO L350 Elim1Store]: Elim1 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 4858 treesize of output 4794 [2022-11-18 20:29:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 20:29:56,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:29:56,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767173806] [2022-11-18 20:29:56,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767173806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:56,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:29:56,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2022-11-18 20:29:56,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71247075] [2022-11-18 20:29:56,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:56,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:29:56,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:29:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:29:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:29:56,269 INFO L87 Difference]: Start difference. First operand 249 states and 262 transitions. Second operand has 27 states, 27 states have (on average 4.37037037037037) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:01,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:01,867 INFO L93 Difference]: Finished difference Result 360 states and 384 transitions. [2022-11-18 20:30:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:30:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.37037037037037) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-18 20:30:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:01,872 INFO L225 Difference]: With dead ends: 360 [2022-11-18 20:30:01,873 INFO L226 Difference]: Without dead ends: 312 [2022-11-18 20:30:01,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=388, Invalid=1592, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:30:01,874 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 402 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:01,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 352 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 541 Invalid, 0 Unknown, 183 Unchecked, 1.6s Time] [2022-11-18 20:30:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-18 20:30:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 249. [2022-11-18 20:30:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0483870967741935) internal successors, (260), 248 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 260 transitions. [2022-11-18 20:30:01,936 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 260 transitions. Word has length 91 [2022-11-18 20:30:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:01,937 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 260 transitions. [2022-11-18 20:30:01,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.37037037037037) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 260 transitions. [2022-11-18 20:30:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-18 20:30:01,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:01,939 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:01,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:02,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:30:02,154 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1382641585, now seen corresponding path program 17 times [2022-11-18 20:30:02,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:30:02,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122911789] [2022-11-18 20:30:02,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:30:02,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:30:02,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:30:02,157 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:30:02,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-18 20:30:02,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-18 20:30:02,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:02,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:30:02,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:02,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:30:02,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:30:03,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:03,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:30:03,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:30:03,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:03,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:30:03,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:03,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:30:03,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:03,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:30:03,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:03,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:30:03,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:03,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:30:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:03,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:30:03,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:30:03,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2022-11-18 20:30:03,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:03,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:30:03,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:30:05,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:05,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2022-11-18 20:30:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 12 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:05,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:22,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-18 20:30:22,796 INFO L350 Elim1Store]: Elim1 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 58 treesize of output 54 [2022-11-18 20:30:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 20 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:23,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:30:23,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122911789] [2022-11-18 20:30:23,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122911789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:23,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:30:23,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 36] total 57 [2022-11-18 20:30:23,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079871357] [2022-11-18 20:30:23,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:23,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-18 20:30:23,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:30:23,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-18 20:30:23,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 20:30:23,640 INFO L87 Difference]: Start difference. First operand 249 states and 260 transitions. Second operand has 57 states, 57 states have (on average 3.087719298245614) internal successors, (176), 57 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:48,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:30:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:51,262 INFO L93 Difference]: Finished difference Result 523 states and 552 transitions. [2022-11-18 20:30:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-18 20:30:51,263 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.087719298245614) internal successors, (176), 57 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-18 20:30:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:51,266 INFO L225 Difference]: With dead ends: 523 [2022-11-18 20:30:51,273 INFO L226 Difference]: Without dead ends: 507 [2022-11-18 20:30:51,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6260 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=2265, Invalid=15825, Unknown=0, NotChecked=0, Total=18090 [2022-11-18 20:30:51,275 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 725 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 131 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1329 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:51,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 743 Invalid, 3165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1704 Invalid, 1 Unknown, 1329 Unchecked, 6.1s Time] [2022-11-18 20:30:51,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-18 20:30:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 324. [2022-11-18 20:30:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.061919504643963) internal successors, (343), 323 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 343 transitions. [2022-11-18 20:30:51,355 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 343 transitions. Word has length 91 [2022-11-18 20:30:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:51,355 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 343 transitions. [2022-11-18 20:30:51,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.087719298245614) internal successors, (176), 57 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 343 transitions. [2022-11-18 20:30:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-18 20:30:51,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:51,357 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:51,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:51,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:30:51,571 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:51,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:51,571 INFO L85 PathProgramCache]: Analyzing trace with hash -4107009, now seen corresponding path program 18 times [2022-11-18 20:30:51,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:30:51,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781642553] [2022-11-18 20:30:51,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:30:51,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:30:51,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:30:51,573 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:30:51,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-18 20:30:51,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-18 20:30:51,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:51,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:30:51,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 24 proven. 204 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:31:04,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 24 proven. 204 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:31:15,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:31:15,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781642553] [2022-11-18 20:31:15,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781642553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:15,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:31:15,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2022-11-18 20:31:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799986797] [2022-11-18 20:31:15,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:15,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:31:15,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:31:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:31:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:31:15,823 INFO L87 Difference]: Start difference. First operand 324 states and 343 transitions. Second operand has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 37 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:30,724 INFO L93 Difference]: Finished difference Result 384 states and 405 transitions. [2022-11-18 20:31:30,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:31:30,729 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 37 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-18 20:31:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:30,730 INFO L225 Difference]: With dead ends: 384 [2022-11-18 20:31:30,730 INFO L226 Difference]: Without dead ends: 261 [2022-11-18 20:31:30,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=450, Invalid=1356, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:31:30,731 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 456 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:30,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 477 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-18 20:31:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-18 20:31:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-11-18 20:31:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0653846153846154) internal successors, (277), 260 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 277 transitions. [2022-11-18 20:31:30,806 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 277 transitions. Word has length 95 [2022-11-18 20:31:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:30,806 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 277 transitions. [2022-11-18 20:31:30,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 37 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 277 transitions. [2022-11-18 20:31:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-18 20:31:30,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:30,808 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:30,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:31,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:31:31,021 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:31,021 INFO L85 PathProgramCache]: Analyzing trace with hash -868614269, now seen corresponding path program 19 times [2022-11-18 20:31:31,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:31:31,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158498278] [2022-11-18 20:31:31,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:31:31,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:31:31,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:31:31,023 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:31:31,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-18 20:31:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:31,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 20:31:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:31,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:31:31,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:31:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:31,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:31,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:31,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:31,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:31:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:32,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:32,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:32,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:32,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:32,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:32,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:32,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:32,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:32,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:32,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:32,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:31:32,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2022-11-18 20:31:32,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:32,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:32,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:32,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:32,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:32,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:31:33,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:31:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 12 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:33,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:42,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-18 20:31:42,756 INFO L350 Elim1Store]: Elim1 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 126 treesize of output 122 [2022-11-18 20:31:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 12 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:43,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:31:43,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158498278] [2022-11-18 20:31:43,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158498278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:43,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:31:43,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 39 [2022-11-18 20:31:43,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001931464] [2022-11-18 20:31:43,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:43,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 20:31:43,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:31:43,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 20:31:43,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:31:43,494 INFO L87 Difference]: Start difference. First operand 261 states and 277 transitions. Second operand has 39 states, 39 states have (on average 4.923076923076923) internal successors, (192), 39 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:53,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:53,904 INFO L93 Difference]: Finished difference Result 502 states and 535 transitions. [2022-11-18 20:31:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-18 20:31:53,905 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.923076923076923) internal successors, (192), 39 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-18 20:31:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:53,907 INFO L225 Difference]: With dead ends: 502 [2022-11-18 20:31:53,908 INFO L226 Difference]: Without dead ends: 486 [2022-11-18 20:31:53,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 201 SyntacticMatches, 20 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2582 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=1071, Invalid=7119, Unknown=0, NotChecked=0, Total=8190 [2022-11-18 20:31:53,909 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 539 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 486 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:53,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 502 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 949 Invalid, 0 Unknown, 486 Unchecked, 2.1s Time] [2022-11-18 20:31:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-18 20:31:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 240. [2022-11-18 20:31:53,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0836820083682008) internal successors, (259), 239 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 259 transitions. [2022-11-18 20:31:53,987 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 259 transitions. Word has length 99 [2022-11-18 20:31:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:53,987 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 259 transitions. [2022-11-18 20:31:53,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.923076923076923) internal successors, (192), 39 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 259 transitions. [2022-11-18 20:31:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-18 20:31:53,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:53,988 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:53,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-18 20:31:54,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:31:54,188 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:54,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:54,189 INFO L85 PathProgramCache]: Analyzing trace with hash 118610165, now seen corresponding path program 20 times [2022-11-18 20:31:54,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:31:54,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423827907] [2022-11-18 20:31:54,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:31:54,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:31:54,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:31:54,190 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:31:54,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-18 20:31:54,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:31:54,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:54,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 20:31:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:54,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:31:54,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:31:54,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:54,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:31:54,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:31:55,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:31:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 58 proven. 224 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:31:56,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:57,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:31:57,908 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 58 [2022-11-18 20:31:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 58 proven. 185 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-18 20:31:58,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:31:58,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423827907] [2022-11-18 20:31:58,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423827907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:58,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:31:58,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2022-11-18 20:31:58,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918569738] [2022-11-18 20:31:58,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:58,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:31:58,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:31:58,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:31:58,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:31:58,465 INFO L87 Difference]: Start difference. First operand 240 states and 259 transitions. Second operand has 33 states, 33 states have (on average 5.242424242424242) internal successors, (173), 33 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:02,588 INFO L93 Difference]: Finished difference Result 336 states and 360 transitions. [2022-11-18 20:32:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:32:02,589 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.242424242424242) internal successors, (173), 33 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-18 20:32:02,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:02,591 INFO L225 Difference]: With dead ends: 336 [2022-11-18 20:32:02,591 INFO L226 Difference]: Without dead ends: 326 [2022-11-18 20:32:02,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 172 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=298, Invalid=2354, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 20:32:02,592 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 330 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:02,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 655 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1060 Invalid, 0 Unknown, 176 Unchecked, 2.3s Time] [2022-11-18 20:32:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-18 20:32:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 252. [2022-11-18 20:32:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0796812749003983) internal successors, (271), 251 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 271 transitions. [2022-11-18 20:32:02,651 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 271 transitions. Word has length 103 [2022-11-18 20:32:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:02,652 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 271 transitions. [2022-11-18 20:32:02,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.242424242424242) internal successors, (173), 33 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 271 transitions. [2022-11-18 20:32:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-18 20:32:02,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:02,653 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:02,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:02,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:32:02,867 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash -274416845, now seen corresponding path program 21 times [2022-11-18 20:32:02,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:32:02,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938271965] [2022-11-18 20:32:02,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:32:02,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:32:02,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:32:02,868 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:32:02,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2ce5c86-3127-4771-b926-eadb3c91056a/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-18 20:32:03,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 20:32:03,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:32:03,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-18 20:32:03,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:03,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:32:03,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:32:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:03,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:32:03,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:03,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:32:03,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:03,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:32:03,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:03,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:32:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:03,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:32:03,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:03,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:32:03,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:03,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-18 20:32:03,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:03,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:03,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:03,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2022-11-18 20:32:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:04,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-11-18 20:32:04,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:32:04,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:04,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2022-11-18 20:32:04,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:04,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-11-18 20:32:04,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:04,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-11-18 20:32:04,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:04,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-11-18 20:32:04,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:04,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-11-18 20:32:04,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:04,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-11-18 20:32:04,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:04,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-11-18 20:32:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:04,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2022-11-18 20:32:04,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:04,838 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:04,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 23 [2022-11-18 20:32:06,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:32:06,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:32:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 16 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:06,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:25,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 108 [2022-11-18 20:33:25,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:33:25,651 INFO L350 Elim1Store]: Elim1 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 233732 treesize of output 233220