./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8 --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 c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- 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-e04fb08 [2022-11-16 12:32:59,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:32:59,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:32:59,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:32:59,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:32:59,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:32:59,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:32:59,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:32:59,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:32:59,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:32:59,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:32:59,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:32:59,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:32:59,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:32:59,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:32:59,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:32:59,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:32:59,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:32:59,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:32:59,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:32:59,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:32:59,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:32:59,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:32:59,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:32:59,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:32:59,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:32:59,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:32:59,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:32:59,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:32:59,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:32:59,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:32:59,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:32:59,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:32:59,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:32:59,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:32:59,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:32:59,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:32:59,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:32:59,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:32:59,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:32:59,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:32:59,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:32:59,932 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:32:59,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:32:59,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:32:59,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:32:59,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:32:59,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:32:59,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:32:59,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:32:59,936 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:32:59,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:32:59,937 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:32:59,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:32:59,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:32:59,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:32:59,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:32:59,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:32:59,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:32:59,939 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:32:59,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:32:59,939 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:32:59,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:32:59,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:32:59,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:32:59,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:32:59,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:32:59,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:32:59,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:32:59,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:32:59,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:32:59,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:32:59,943 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:32:59,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:32:59,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:32:59,944 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_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2022-11-16 12:33:00,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:33:00,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:33:00,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:33:00,345 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:33:00,346 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:33:00,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-tiling/pnr5.c [2022-11-16 12:33:00,434 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/data/f97ba1450/2edfa5057ba7497e9243665b2c2dd2da/FLAG3f1384a80 [2022-11-16 12:33:00,919 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:33:00,924 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/sv-benchmarks/c/array-tiling/pnr5.c [2022-11-16 12:33:00,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/data/f97ba1450/2edfa5057ba7497e9243665b2c2dd2da/FLAG3f1384a80 [2022-11-16 12:33:01,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/data/f97ba1450/2edfa5057ba7497e9243665b2c2dd2da [2022-11-16 12:33:01,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:33:01,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:33:01,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:33:01,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:33:01,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:33:01,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ede77b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01, skipping insertion in model container [2022-11-16 12:33:01,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:33:01,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:33:01,569 WARN L229 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_9d37199b-5f9e-416f-a267-31947f721d25/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2022-11-16 12:33:01,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:33:01,636 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:33:01,655 WARN L229 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_9d37199b-5f9e-416f-a267-31947f721d25/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2022-11-16 12:33:01,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:33:01,701 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:33:01,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01 WrapperNode [2022-11-16 12:33:01,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:33:01,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:33:01,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:33:01,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:33:01,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,765 INFO L138 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2022-11-16 12:33:01,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:33:01,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:33:01,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:33:01,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:33:01,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,809 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:33:01,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:33:01,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:33:01,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:33:01,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (1/1) ... [2022-11-16 12:33:01,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:33:01,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:01,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:33:01,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:33:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:33:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:33:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:33:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:33:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-11-16 12:33:01,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-11-16 12:33:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:33:01,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:33:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:33:02,009 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:33:02,012 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:33:02,246 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:33:02,252 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:33:02,252 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:33:02,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:33:02 BoogieIcfgContainer [2022-11-16 12:33:02,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:33:02,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:33:02,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:33:02,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:33:02,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:33:01" (1/3) ... [2022-11-16 12:33:02,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bce1d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:33:02, skipping insertion in model container [2022-11-16 12:33:02,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:01" (2/3) ... [2022-11-16 12:33:02,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bce1d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:33:02, skipping insertion in model container [2022-11-16 12:33:02,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:33:02" (3/3) ... [2022-11-16 12:33:02,269 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr5.c [2022-11-16 12:33:02,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:33:02,314 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:33:02,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:33:02,369 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;@7db8f53e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:33:02,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:33:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:33:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:33:02,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:02,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:02,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:02,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1765780314, now seen corresponding path program 1 times [2022-11-16 12:33:02,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:02,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130872659] [2022-11-16 12:33:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:02,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:02,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:02,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130872659] [2022-11-16 12:33:02,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130872659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:02,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:02,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:33:02,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375037539] [2022-11-16 12:33:02,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:02,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:33:02,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:33:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:33:02,689 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:02,725 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2022-11-16 12:33:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:33:02,729 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:33:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:02,737 INFO L225 Difference]: With dead ends: 69 [2022-11-16 12:33:02,738 INFO L226 Difference]: Without dead ends: 33 [2022-11-16 12:33:02,741 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 [2022-11-16 12:33:02,747 INFO L413 NwaCegarLoop]: 49 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, 49 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 [2022-11-16 12:33:02,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:33:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-16 12:33:02,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-16 12:33:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:33:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-16 12:33:02,801 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 11 [2022-11-16 12:33:02,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:02,802 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-16 12:33:02,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-16 12:33:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:33:02,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:02,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:02,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:33:02,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:02,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1807338759, now seen corresponding path program 1 times [2022-11-16 12:33:02,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:02,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984323174] [2022-11-16 12:33:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:02,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:03,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:03,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984323174] [2022-11-16 12:33:03,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984323174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:03,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:03,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:33:03,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062505460] [2022-11-16 12:33:03,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:03,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:33:03,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:33:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:33:03,266 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:03,468 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-11-16 12:33:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:33:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:33:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:03,470 INFO L225 Difference]: With dead ends: 57 [2022-11-16 12:33:03,470 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 12:33:03,471 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 [2022-11-16 12:33:03,472 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 123 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:03,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:33:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 12:33:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2022-11-16 12:33:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:33:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-16 12:33:03,487 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 11 [2022-11-16 12:33:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:03,487 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-16 12:33:03,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-16 12:33:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:33:03,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:03,490 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:03,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:33:03,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:03,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1950771071, now seen corresponding path program 1 times [2022-11-16 12:33:03,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:03,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327073778] [2022-11-16 12:33:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:03,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:04,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:33:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:04,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:33:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:04,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:33:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:04,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:33:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:04,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:33:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:04,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:04,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327073778] [2022-11-16 12:33:04,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327073778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:04,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811938222] [2022-11-16 12:33:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:04,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:04,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:04,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:04,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:33:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:33:04,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:04,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:33:04,755 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 30 treesize of output 29 [2022-11-16 12:33:04,811 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 30 treesize of output 29 [2022-11-16 12:33:04,879 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 30 treesize of output 29 [2022-11-16 12:33:04,950 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 35 treesize of output 34 [2022-11-16 12:33:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:05,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:05,269 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 [2022-11-16 12:33:05,274 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 18 treesize of output 16 [2022-11-16 12:33:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:05,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811938222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:05,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:05,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 13 [2022-11-16 12:33:05,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114508149] [2022-11-16 12:33:05,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:05,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:33:05,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:05,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:33:05,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:33:05,310 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:33:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:06,019 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2022-11-16 12:33:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:33:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2022-11-16 12:33:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:06,027 INFO L225 Difference]: With dead ends: 120 [2022-11-16 12:33:06,028 INFO L226 Difference]: Without dead ends: 118 [2022-11-16 12:33:06,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:33:06,033 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 217 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:06,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 290 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:33:06,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-16 12:33:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 54. [2022-11-16 12:33:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:33:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2022-11-16 12:33:06,059 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 43 [2022-11-16 12:33:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:06,060 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2022-11-16 12:33:06,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:33:06,060 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2022-11-16 12:33:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:33:06,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:06,067 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:06,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:33:06,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:06,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1642596351, now seen corresponding path program 1 times [2022-11-16 12:33:06,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:06,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929283017] [2022-11-16 12:33:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:06,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:06,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:33:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:06,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:33:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:06,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:33:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:06,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:33:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:06,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:33:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:06,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:06,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929283017] [2022-11-16 12:33:06,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929283017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:06,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232233511] [2022-11-16 12:33:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:06,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:06,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:06,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:06,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:33:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:06,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:33:06,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:07,118 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 [2022-11-16 12:33:07,248 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 [2022-11-16 12:33:07,330 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 [2022-11-16 12:33:07,410 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 [2022-11-16 12:33:07,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:33:07,527 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 [2022-11-16 12:33:07,633 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 [2022-11-16 12:33:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:33:07,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:07,910 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 16 treesize of output 14 [2022-11-16 12:33:07,918 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 22 [2022-11-16 12:33:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:08,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232233511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:08,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:08,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 21 [2022-11-16 12:33:08,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912867335] [2022-11-16 12:33:08,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:08,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:33:08,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:33:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:33:08,038 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 12:33:09,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:09,456 INFO L93 Difference]: Finished difference Result 179 states and 251 transitions. [2022-11-16 12:33:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:33:09,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 43 [2022-11-16 12:33:09,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:09,460 INFO L225 Difference]: With dead ends: 179 [2022-11-16 12:33:09,460 INFO L226 Difference]: Without dead ends: 177 [2022-11-16 12:33:09,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=320, Invalid=1320, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:33:09,463 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 230 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:09,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 628 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 678 Invalid, 0 Unknown, 89 Unchecked, 0.7s Time] [2022-11-16 12:33:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-16 12:33:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 87. [2022-11-16 12:33:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.359375) internal successors, (87), 65 states have internal predecessors, (87), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 12:33:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 127 transitions. [2022-11-16 12:33:09,496 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 127 transitions. Word has length 43 [2022-11-16 12:33:09,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:09,497 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 127 transitions. [2022-11-16 12:33:09,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 12:33:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 127 transitions. [2022-11-16 12:33:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 12:33:09,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:09,499 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:09,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:09,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:09,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1666037387, now seen corresponding path program 1 times [2022-11-16 12:33:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:09,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106148531] [2022-11-16 12:33:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:09,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:10,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:33:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:10,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:33:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:10,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:33:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:10,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:33:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:10,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:33:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:10,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:10,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106148531] [2022-11-16 12:33:10,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106148531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:10,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128719817] [2022-11-16 12:33:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:10,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:10,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:10,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:10,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:33:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:10,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 12:33:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:10,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:33:10,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-16 12:33:10,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:33:10,609 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 43 treesize of output 45 [2022-11-16 12:33:10,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:33:10,672 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 52 treesize of output 54 [2022-11-16 12:33:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:10,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:10,992 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 [2022-11-16 12:33:10,995 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 [2022-11-16 12:33:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:11,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128719817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:11,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:11,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 17 [2022-11-16 12:33:11,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632791386] [2022-11-16 12:33:11,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:11,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:33:11,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:11,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:33:11,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:33:11,045 INFO L87 Difference]: Start difference. First operand 87 states and 127 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 5 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 12:33:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:12,361 INFO L93 Difference]: Finished difference Result 419 states and 636 transitions. [2022-11-16 12:33:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:33:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 5 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 47 [2022-11-16 12:33:12,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:12,364 INFO L225 Difference]: With dead ends: 419 [2022-11-16 12:33:12,364 INFO L226 Difference]: Without dead ends: 417 [2022-11-16 12:33:12,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:33:12,366 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 207 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:12,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 487 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:33:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-16 12:33:12,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 216. [2022-11-16 12:33:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 158 states have (on average 1.4050632911392404) internal successors, (222), 161 states have internal predecessors, (222), 55 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-11-16 12:33:12,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 332 transitions. [2022-11-16 12:33:12,451 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 332 transitions. Word has length 47 [2022-11-16 12:33:12,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:12,451 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 332 transitions. [2022-11-16 12:33:12,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 5 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 12:33:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 332 transitions. [2022-11-16 12:33:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 12:33:12,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:12,455 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:12,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:12,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:12,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash -279833993, now seen corresponding path program 1 times [2022-11-16 12:33:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:12,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284241061] [2022-11-16 12:33:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:12,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:13,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:33:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:33:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:13,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:33:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:13,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:33:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:13,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:33:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:13,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:13,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284241061] [2022-11-16 12:33:13,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284241061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:13,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056906865] [2022-11-16 12:33:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:13,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:13,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:13,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:13,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:33:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:13,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:33:13,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:13,499 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 [2022-11-16 12:33:13,586 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 [2022-11-16 12:33:13,667 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 29 treesize of output 28 [2022-11-16 12:33:13,742 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 [2022-11-16 12:33:13,864 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 [2022-11-16 12:33:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:33:13,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:14,087 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 18 treesize of output 16 [2022-11-16 12:33:14,092 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 22 [2022-11-16 12:33:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:14,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056906865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:14,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:14,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2022-11-16 12:33:14,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375660756] [2022-11-16 12:33:14,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:14,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:33:14,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:14,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:33:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:33:14,227 INFO L87 Difference]: Start difference. First operand 216 states and 332 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 12:33:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:15,823 INFO L93 Difference]: Finished difference Result 527 states and 790 transitions. [2022-11-16 12:33:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:33:15,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 47 [2022-11-16 12:33:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:15,827 INFO L225 Difference]: With dead ends: 527 [2022-11-16 12:33:15,828 INFO L226 Difference]: Without dead ends: 525 [2022-11-16 12:33:15,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 12:33:15,830 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 267 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:15,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 672 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 946 Invalid, 0 Unknown, 129 Unchecked, 0.8s Time] [2022-11-16 12:33:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-16 12:33:15,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 283. [2022-11-16 12:33:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 204 states have (on average 1.4166666666666667) internal successors, (289), 208 states have internal predecessors, (289), 74 states have call successors, (74), 4 states have call predecessors, (74), 4 states have return successors, (74), 70 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-16 12:33:15,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 437 transitions. [2022-11-16 12:33:15,905 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 437 transitions. Word has length 47 [2022-11-16 12:33:15,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:15,906 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 437 transitions. [2022-11-16 12:33:15,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 12:33:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 437 transitions. [2022-11-16 12:33:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 12:33:15,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:15,909 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:15,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:16,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:16,120 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2054316525, now seen corresponding path program 1 times [2022-11-16 12:33:16,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:16,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177391886] [2022-11-16 12:33:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:16,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:16,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:33:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:16,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:33:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:16,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:33:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:16,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:33:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:16,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:33:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:16,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177391886] [2022-11-16 12:33:16,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177391886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:16,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154114715] [2022-11-16 12:33:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:16,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:16,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:16,544 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:16,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:33:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:33:16,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:16,801 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 [2022-11-16 12:33:16,892 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 [2022-11-16 12:33:16,965 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 [2022-11-16 12:33:17,157 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 [2022-11-16 12:33:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:33:17,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:17,375 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 18 treesize of output 16 [2022-11-16 12:33:17,378 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 22 [2022-11-16 12:33:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:17,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154114715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:17,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:17,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 26 [2022-11-16 12:33:17,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423851672] [2022-11-16 12:33:17,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:17,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:33:17,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:17,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:33:17,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:33:17,511 INFO L87 Difference]: Start difference. First operand 283 states and 437 transitions. Second operand has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 12:33:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:18,174 INFO L93 Difference]: Finished difference Result 547 states and 830 transitions. [2022-11-16 12:33:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:33:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 51 [2022-11-16 12:33:18,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:18,182 INFO L225 Difference]: With dead ends: 547 [2022-11-16 12:33:18,182 INFO L226 Difference]: Without dead ends: 545 [2022-11-16 12:33:18,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:33:18,184 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 307 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:18,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 439 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 289 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2022-11-16 12:33:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-16 12:33:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 327. [2022-11-16 12:33:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 236 states have (on average 1.4110169491525424) internal successors, (333), 240 states have internal predecessors, (333), 82 states have call successors, (82), 8 states have call predecessors, (82), 8 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-16 12:33:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 497 transitions. [2022-11-16 12:33:18,278 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 497 transitions. Word has length 51 [2022-11-16 12:33:18,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:18,278 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 497 transitions. [2022-11-16 12:33:18,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 12:33:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 497 transitions. [2022-11-16 12:33:18,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 12:33:18,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:18,281 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:18,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:18,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:33:18,486 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash 774452847, now seen corresponding path program 1 times [2022-11-16 12:33:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:18,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598005675] [2022-11-16 12:33:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:18,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:33:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:18,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:33:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:18,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:33:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:18,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:33:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:18,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:33:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:18,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:18,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598005675] [2022-11-16 12:33:18,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598005675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:18,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549946737] [2022-11-16 12:33:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:18,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:18,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:18,951 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:18,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:33:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:19,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:33:19,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:19,207 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 [2022-11-16 12:33:19,302 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 [2022-11-16 12:33:19,372 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 [2022-11-16 12:33:19,547 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 [2022-11-16 12:33:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:33:19,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:19,776 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 18 treesize of output 16 [2022-11-16 12:33:19,780 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 22 [2022-11-16 12:33:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:19,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549946737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:19,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:19,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-11-16 12:33:19,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434897279] [2022-11-16 12:33:19,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:19,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:33:19,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:19,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:33:19,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:33:19,934 INFO L87 Difference]: Start difference. First operand 327 states and 497 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 12:33:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:22,748 INFO L93 Difference]: Finished difference Result 1595 states and 2472 transitions. [2022-11-16 12:33:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:33:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 51 [2022-11-16 12:33:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:22,757 INFO L225 Difference]: With dead ends: 1595 [2022-11-16 12:33:22,757 INFO L226 Difference]: Without dead ends: 1593 [2022-11-16 12:33:22,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=654, Invalid=3378, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 12:33:22,761 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 720 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:22,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 836 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 1400 Invalid, 0 Unknown, 167 Unchecked, 1.3s Time] [2022-11-16 12:33:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-11-16 12:33:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 662. [2022-11-16 12:33:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 470 states have (on average 1.4404255319148935) internal successors, (677), 477 states have internal predecessors, (677), 179 states have call successors, (179), 12 states have call predecessors, (179), 12 states have return successors, (179), 172 states have call predecessors, (179), 179 states have call successors, (179) [2022-11-16 12:33:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1035 transitions. [2022-11-16 12:33:22,950 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1035 transitions. Word has length 51 [2022-11-16 12:33:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:22,951 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1035 transitions. [2022-11-16 12:33:22,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 12:33:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1035 transitions. [2022-11-16 12:33:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:33:22,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:22,955 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:22,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:23,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:33:23,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash 881708129, now seen corresponding path program 2 times [2022-11-16 12:33:23,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:23,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829545373] [2022-11-16 12:33:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:23,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:23,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:33:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:23,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:33:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:23,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:33:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:23,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:33:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:23,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:33:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:23,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:23,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829545373] [2022-11-16 12:33:23,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829545373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960468904] [2022-11-16 12:33:23,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:33:23,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:23,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:23,611 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:23,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:33:23,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:33:23,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:23,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:33:23,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:23,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:33:23,789 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 [2022-11-16 12:33:23,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:33:23,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:33:23,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2022-11-16 12:33:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:23,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:24,070 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 [2022-11-16 12:33:24,072 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 [2022-11-16 12:33:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:24,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960468904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:24,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:24,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-11-16 12:33:24,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869068038] [2022-11-16 12:33:24,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:24,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:33:24,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:33:24,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:33:24,122 INFO L87 Difference]: Start difference. First operand 662 states and 1035 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:33:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:28,383 INFO L93 Difference]: Finished difference Result 5707 states and 9176 transitions. [2022-11-16 12:33:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-16 12:33:28,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2022-11-16 12:33:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:28,414 INFO L225 Difference]: With dead ends: 5707 [2022-11-16 12:33:28,414 INFO L226 Difference]: Without dead ends: 5705 [2022-11-16 12:33:28,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=636, Invalid=3146, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 12:33:28,422 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 244 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 2955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:28,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1373 Invalid, 2955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 12:33:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2022-11-16 12:33:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 1693. [2022-11-16 12:33:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1206 states have (on average 1.466832504145937) internal successors, (1769), 1209 states have internal predecessors, (1769), 474 states have call successors, (474), 12 states have call predecessors, (474), 12 states have return successors, (474), 471 states have call predecessors, (474), 474 states have call successors, (474) [2022-11-16 12:33:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2717 transitions. [2022-11-16 12:33:29,063 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2717 transitions. Word has length 55 [2022-11-16 12:33:29,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:29,065 INFO L495 AbstractCegarLoop]: Abstraction has 1693 states and 2717 transitions. [2022-11-16 12:33:29,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:33:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2717 transitions. [2022-11-16 12:33:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:33:29,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:29,070 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:29,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 12:33:29,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:29,275 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:29,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1022256739, now seen corresponding path program 1 times [2022-11-16 12:33:29,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:29,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795179071] [2022-11-16 12:33:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:29,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:29,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:33:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:29,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:33:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:29,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:33:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:29,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:33:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:29,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:33:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:29,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:29,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795179071] [2022-11-16 12:33:29,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795179071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:29,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752485297] [2022-11-16 12:33:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:29,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:29,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:29,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:29,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:33:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:29,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:33:29,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:30,092 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 [2022-11-16 12:33:30,184 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 [2022-11-16 12:33:30,420 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 [2022-11-16 12:33:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:33:30,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:30,623 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 18 treesize of output 16 [2022-11-16 12:33:30,626 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 22 [2022-11-16 12:33:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:30,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752485297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:30,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:30,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 28 [2022-11-16 12:33:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099284139] [2022-11-16 12:33:30,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:30,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:33:30,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:30,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:33:30,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:33:30,788 INFO L87 Difference]: Start difference. First operand 1693 states and 2717 transitions. Second operand has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 12:33:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:37,511 INFO L93 Difference]: Finished difference Result 6358 states and 10161 transitions. [2022-11-16 12:33:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-16 12:33:37,512 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 55 [2022-11-16 12:33:37,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:37,542 INFO L225 Difference]: With dead ends: 6358 [2022-11-16 12:33:37,542 INFO L226 Difference]: Without dead ends: 6356 [2022-11-16 12:33:37,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1169, Invalid=7021, Unknown=0, NotChecked=0, Total=8190 [2022-11-16 12:33:37,549 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 889 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 3209 mSolverCounterSat, 911 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 4430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 3209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:37,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1767 Invalid, 4430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 3209 Invalid, 0 Unknown, 310 Unchecked, 2.9s Time] [2022-11-16 12:33:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2022-11-16 12:33:38,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 2164. [2022-11-16 12:33:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 1538 states have (on average 1.4713914174252276) internal successors, (2263), 1541 states have internal predecessors, (2263), 609 states have call successors, (609), 16 states have call predecessors, (609), 16 states have return successors, (609), 606 states have call predecessors, (609), 609 states have call successors, (609) [2022-11-16 12:33:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 3481 transitions. [2022-11-16 12:33:38,271 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 3481 transitions. Word has length 55 [2022-11-16 12:33:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:38,272 INFO L495 AbstractCegarLoop]: Abstraction has 2164 states and 3481 transitions. [2022-11-16 12:33:38,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 12:33:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 3481 transitions. [2022-11-16 12:33:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:33:38,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:38,275 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:38,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:38,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:33:38,481 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:38,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1863871831, now seen corresponding path program 3 times [2022-11-16 12:33:38,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:38,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964706755] [2022-11-16 12:33:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:38,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:38,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:33:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:38,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:33:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:38,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:33:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:38,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:33:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:38,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:33:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:38,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:38,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964706755] [2022-11-16 12:33:38,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964706755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:38,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665945296] [2022-11-16 12:33:38,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:33:38,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:38,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:38,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:38,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:33:38,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 12:33:38,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:38,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:33:38,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:39,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:33:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:39,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:39,334 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 18 treesize of output 16 [2022-11-16 12:33:39,337 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 22 [2022-11-16 12:33:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:39,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665945296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:39,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:39,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-11-16 12:33:39,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770668792] [2022-11-16 12:33:39,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:39,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:33:39,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:39,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:33:39,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:33:39,401 INFO L87 Difference]: Start difference. First operand 2164 states and 3481 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:33:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:51,833 INFO L93 Difference]: Finished difference Result 21099 states and 33178 transitions. [2022-11-16 12:33:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-11-16 12:33:51,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2022-11-16 12:33:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:51,922 INFO L225 Difference]: With dead ends: 21099 [2022-11-16 12:33:51,922 INFO L226 Difference]: Without dead ends: 21097 [2022-11-16 12:33:51,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6608 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1996, Invalid=15560, Unknown=0, NotChecked=0, Total=17556 [2022-11-16 12:33:51,939 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 526 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 5553 mSolverCounterSat, 1898 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 7451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1898 IncrementalHoareTripleChecker+Valid, 5553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:51,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 2478 Invalid, 7451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1898 Valid, 5553 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-16 12:33:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21097 states. [2022-11-16 12:33:53,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21097 to 5809. [2022-11-16 12:33:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 4116 states have (on average 1.4834791059280856) internal successors, (6106), 4116 states have internal predecessors, (6106), 1676 states have call successors, (1676), 16 states have call predecessors, (1676), 16 states have return successors, (1676), 1676 states have call predecessors, (1676), 1676 states have call successors, (1676) [2022-11-16 12:33:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 9458 transitions. [2022-11-16 12:33:53,854 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 9458 transitions. Word has length 59 [2022-11-16 12:33:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:53,855 INFO L495 AbstractCegarLoop]: Abstraction has 5809 states and 9458 transitions. [2022-11-16 12:33:53,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:33:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 9458 transitions. [2022-11-16 12:33:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:33:53,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:53,859 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:53,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:54,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:33:54,065 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:33:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:54,065 INFO L85 PathProgramCache]: Analyzing trace with hash 58433497, now seen corresponding path program 1 times [2022-11-16 12:33:54,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:54,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221788328] [2022-11-16 12:33:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:54,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:54,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:33:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:54,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:33:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:54,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:33:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:54,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:33:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:54,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:33:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:54,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:54,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221788328] [2022-11-16 12:33:54,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221788328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:54,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011446305] [2022-11-16 12:33:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:54,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:54,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:54,564 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:54,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:33:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:33:54,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:54,889 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 13 treesize of output 9 [2022-11-16 12:33:55,195 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 [2022-11-16 12:33:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:55,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:55,395 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 18 treesize of output 16 [2022-11-16 12:33:55,398 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 22 [2022-11-16 12:33:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:33:55,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011446305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:55,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:55,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-16 12:33:55,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639624628] [2022-11-16 12:33:55,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:55,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:33:55,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:55,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:33:55,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:33:55,581 INFO L87 Difference]: Start difference. First operand 5809 states and 9458 transitions. Second operand has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 12:34:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:12,832 INFO L93 Difference]: Finished difference Result 19191 states and 30861 transitions. [2022-11-16 12:34:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-11-16 12:34:12,833 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 59 [2022-11-16 12:34:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:12,900 INFO L225 Difference]: With dead ends: 19191 [2022-11-16 12:34:12,901 INFO L226 Difference]: Without dead ends: 19189 [2022-11-16 12:34:12,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11583 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=4666, Invalid=26840, Unknown=0, NotChecked=0, Total=31506 [2022-11-16 12:34:12,915 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1194 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 5211 mSolverCounterSat, 2363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 7574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2363 IncrementalHoareTripleChecker+Valid, 5211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:12,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1194 Valid, 2006 Invalid, 7574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2363 Valid, 5211 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-16 12:34:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19189 states. [2022-11-16 12:34:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19189 to 2212. [2022-11-16 12:34:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1586 states have (on average 1.4621689785624212) internal successors, (2319), 1589 states have internal predecessors, (2319), 609 states have call successors, (609), 16 states have call predecessors, (609), 16 states have return successors, (609), 606 states have call predecessors, (609), 609 states have call successors, (609) [2022-11-16 12:34:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3537 transitions. [2022-11-16 12:34:14,191 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3537 transitions. Word has length 59 [2022-11-16 12:34:14,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:14,192 INFO L495 AbstractCegarLoop]: Abstraction has 2212 states and 3537 transitions. [2022-11-16 12:34:14,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 12:34:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3537 transitions. [2022-11-16 12:34:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 12:34:14,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:14,195 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:14,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:14,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:34:14,400 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash 819831629, now seen corresponding path program 4 times [2022-11-16 12:34:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:14,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547607762] [2022-11-16 12:34:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:14,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:14,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:34:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:14,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:34:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:14,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:34:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:14,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:34:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:14,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:34:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:34:14,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547607762] [2022-11-16 12:34:14,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547607762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333620980] [2022-11-16 12:34:14,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:34:14,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:34:14,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:34:14,839 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:34:14,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:34:14,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:34:14,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:14,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:34:14,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:34:15,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:34:15,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333620980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:15,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:34:15,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-11-16 12:34:15,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111141117] [2022-11-16 12:34:15,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:15,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:34:15,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:15,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:34:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:34:15,650 INFO L87 Difference]: Start difference. First operand 2212 states and 3537 transitions. Second operand has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 12:34:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:16,923 INFO L93 Difference]: Finished difference Result 2444 states and 3886 transitions. [2022-11-16 12:34:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:34:16,923 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 63 [2022-11-16 12:34:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:16,931 INFO L225 Difference]: With dead ends: 2444 [2022-11-16 12:34:16,931 INFO L226 Difference]: Without dead ends: 2416 [2022-11-16 12:34:16,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:34:16,934 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 280 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:16,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 161 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:34:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-11-16 12:34:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2229. [2022-11-16 12:34:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 1602 states have (on average 1.4525593008739077) internal successors, (2327), 1602 states have internal predecessors, (2327), 610 states have call successors, (610), 16 states have call predecessors, (610), 16 states have return successors, (610), 610 states have call predecessors, (610), 610 states have call successors, (610) [2022-11-16 12:34:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 3547 transitions. [2022-11-16 12:34:17,869 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 3547 transitions. Word has length 63 [2022-11-16 12:34:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:17,870 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 3547 transitions. [2022-11-16 12:34:17,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 12:34:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 3547 transitions. [2022-11-16 12:34:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 12:34:17,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:17,886 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:17,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:18,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:34:18,092 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash 374578441, now seen corresponding path program 2 times [2022-11-16 12:34:18,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:18,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201095402] [2022-11-16 12:34:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:18,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:18,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:34:18,457 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) [2022-11-16 12:34:18,465 INFO L158 Benchmark]: Toolchain (without parser) took 77178.93ms. Allocated memory was 96.5MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 61.7MB in the beginning and 1.9GB in the end (delta: -1.9GB). Peak memory consumption was 478.6MB. Max. memory is 16.1GB. [2022-11-16 12:34:18,466 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory was 66.3MB in the beginning and 66.2MB in the end (delta: 30.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:34:18,466 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.41ms. Allocated memory is still 96.5MB. Free memory was 61.5MB in the beginning and 71.0MB in the end (delta: -9.5MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. [2022-11-16 12:34:18,466 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.02ms. Allocated memory is still 96.5MB. Free memory was 71.0MB in the beginning and 69.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:34:18,467 INFO L158 Benchmark]: Boogie Preprocessor took 54.21ms. Allocated memory is still 96.5MB. Free memory was 69.3MB in the beginning and 67.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:34:18,468 INFO L158 Benchmark]: RCFGBuilder took 433.22ms. Allocated memory is still 96.5MB. Free memory was 67.6MB in the beginning and 54.2MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-16 12:34:18,468 INFO L158 Benchmark]: TraceAbstraction took 76207.74ms. Allocated memory was 96.5MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 53.6MB in the beginning and 1.9GB in the end (delta: -1.9GB). Peak memory consumption was 472.7MB. Max. memory is 16.1GB. [2022-11-16 12:34:18,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory was 66.3MB in the beginning and 66.2MB in the end (delta: 30.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 413.41ms. Allocated memory is still 96.5MB. Free memory was 61.5MB in the beginning and 71.0MB in the end (delta: -9.5MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.02ms. Allocated memory is still 96.5MB. Free memory was 71.0MB in the beginning and 69.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.21ms. Allocated memory is still 96.5MB. Free memory was 69.3MB in the beginning and 67.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 433.22ms. Allocated memory is still 96.5MB. Free memory was 67.6MB in the beginning and 54.2MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 76207.74ms. Allocated memory was 96.5MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 53.6MB in the beginning and 1.9GB in the end (delta: -1.9GB). Peak memory consumption was 472.7MB. 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. [2022-11-16 12:34:18,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8 --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 c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- 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-e04fb08 [2022-11-16 12:34:21,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:34:21,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:34:21,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:34:21,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:34:21,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:34:21,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:34:21,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:34:21,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:34:21,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:34:21,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:34:21,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:34:21,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:34:21,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:34:21,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:34:21,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:34:21,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:34:21,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:34:21,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:34:21,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:34:21,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:34:21,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:34:21,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:34:21,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:34:21,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:34:21,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:34:21,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:34:21,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:34:21,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:34:21,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:34:21,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:34:21,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:34:21,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:34:21,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:34:21,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:34:21,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:34:21,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:34:21,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:34:21,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:34:21,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:34:21,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:34:21,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-16 12:34:21,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:34:21,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:34:21,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:34:21,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:34:21,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:34:21,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:34:21,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:34:21,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:34:21,175 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:34:21,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:34:21,176 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:34:21,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:34:21,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:34:21,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:34:21,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:34:21,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:34:21,178 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:34:21,178 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 12:34:21,178 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 12:34:21,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:34:21,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:34:21,179 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:34:21,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:34:21,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:34:21,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:34:21,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:34:21,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:34:21,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:34:21,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:34:21,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:34:21,181 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 12:34:21,181 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:21,182 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:34:21,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:34:21,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:34:21,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 12:34:21,183 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_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2022-11-16 12:34:21,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:34:21,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:34:21,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:34:21,636 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:34:21,637 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:34:21,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-tiling/pnr5.c [2022-11-16 12:34:21,715 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/data/1772f4582/9a98a236a7c74794b083671fb96a38aa/FLAG0bd7192c5 [2022-11-16 12:34:22,290 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:34:22,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/sv-benchmarks/c/array-tiling/pnr5.c [2022-11-16 12:34:22,301 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/data/1772f4582/9a98a236a7c74794b083671fb96a38aa/FLAG0bd7192c5 [2022-11-16 12:34:22,662 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/data/1772f4582/9a98a236a7c74794b083671fb96a38aa [2022-11-16 12:34:22,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:34:22,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:34:22,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:34:22,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:34:22,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:34:22,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:22,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531c4b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22, skipping insertion in model container [2022-11-16 12:34:22,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:22,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:34:22,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:34:22,854 WARN L229 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_9d37199b-5f9e-416f-a267-31947f721d25/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2022-11-16 12:34:22,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:34:22,890 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:34:22,936 WARN L229 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_9d37199b-5f9e-416f-a267-31947f721d25/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2022-11-16 12:34:22,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:34:22,964 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:34:22,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22 WrapperNode [2022-11-16 12:34:22,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:34:22,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:34:22,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:34:22,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:34:22,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:22,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:23,005 INFO L138 Inliner]: procedures = 19, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2022-11-16 12:34:23,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:34:23,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:34:23,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:34:23,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:34:23,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:23,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:23,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:23,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:23,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:23,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:23,039 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:23,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:23,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:34:23,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:34:23,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:34:23,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:34:23,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (1/1) ... [2022-11-16 12:34:23,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:34:23,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:34:23,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:34:23,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:34:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:34:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 12:34:23,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:34:23,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 12:34:23,121 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-11-16 12:34:23,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-11-16 12:34:23,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:34:23,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:34:23,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 12:34:23,203 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:34:23,205 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:34:23,674 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:34:23,680 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:34:23,681 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:34:23,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:34:23 BoogieIcfgContainer [2022-11-16 12:34:23,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:34:23,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:34:23,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:34:23,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:34:23,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:34:22" (1/3) ... [2022-11-16 12:34:23,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44290385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:34:23, skipping insertion in model container [2022-11-16 12:34:23,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:22" (2/3) ... [2022-11-16 12:34:23,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44290385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:34:23, skipping insertion in model container [2022-11-16 12:34:23,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:34:23" (3/3) ... [2022-11-16 12:34:23,709 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr5.c [2022-11-16 12:34:23,730 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:34:23,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:34:23,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:34:23,824 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;@eb04f0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:34:23,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:34:23,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:34:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:34:23,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:23,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:23,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:23,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1765780314, now seen corresponding path program 1 times [2022-11-16 12:34:23,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:23,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989775743] [2022-11-16 12:34:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:23,863 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 [2022-11-16 12:34:23,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:23,864 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:23,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:24,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 12:34:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:24,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:34:24,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:24,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989775743] [2022-11-16 12:34:24,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989775743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:24,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:24,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:34:24,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213601755] [2022-11-16 12:34:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:24,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:34:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:24,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:34:24,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:34:24,107 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:24,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:24,147 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2022-11-16 12:34:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:34:24,150 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:34:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:24,158 INFO L225 Difference]: With dead ends: 69 [2022-11-16 12:34:24,158 INFO L226 Difference]: Without dead ends: 33 [2022-11-16 12:34:24,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:34:24,166 INFO L413 NwaCegarLoop]: 49 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, 49 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 [2022-11-16 12:34:24,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:34:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-16 12:34:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-16 12:34:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:34:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-16 12:34:24,224 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 11 [2022-11-16 12:34:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:24,225 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-16 12:34:24,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-16 12:34:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:34:24,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:24,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:24,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:24,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:24,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:24,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1807338759, now seen corresponding path program 1 times [2022-11-16 12:34:24,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:24,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484228689] [2022-11-16 12:34:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:24,450 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 [2022-11-16 12:34:24,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:24,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:24,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:34:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:25,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:34:25,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:25,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484228689] [2022-11-16 12:34:25,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484228689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:25,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:25,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:34:25,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547898589] [2022-11-16 12:34:25,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:25,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:34:25,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:34:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:34:25,473 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:27,054 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-11-16 12:34:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:34:27,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:34:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:27,061 INFO L225 Difference]: With dead ends: 57 [2022-11-16 12:34:27,061 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 12:34:27,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:34:27,062 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:27,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 39 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 12:34:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 12:34:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2022-11-16 12:34:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:34:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-16 12:34:27,076 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 11 [2022-11-16 12:34:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:27,076 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-16 12:34:27,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-16 12:34:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:34:27,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:27,078 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:27,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:27,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:27,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1950771071, now seen corresponding path program 1 times [2022-11-16 12:34:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:27,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920176408] [2022-11-16 12:34:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:27,296 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 [2022-11-16 12:34:27,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:27,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:27,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:27,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:34:27,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:27,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:34:27,692 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 30 treesize of output 29 [2022-11-16 12:34:27,752 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 30 treesize of output 29 [2022-11-16 12:34:27,821 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 30 treesize of output 29 [2022-11-16 12:34:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:27,896 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 22 treesize of output 21 [2022-11-16 12:34:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:34:27,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:28,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920176408] [2022-11-16 12:34:28,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920176408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1149121277] [2022-11-16 12:34:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:28,204 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:28,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:34:28,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:34:28,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-16 12:34:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:28,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:34:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:28,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:34:29,024 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 30 treesize of output 29 [2022-11-16 12:34:29,177 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 30 treesize of output 29 [2022-11-16 12:34:29,318 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 30 treesize of output 29 [2022-11-16 12:34:29,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:29,461 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 22 treesize of output 21 [2022-11-16 12:34:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:34:29,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:29,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1149121277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:29,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:29,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-11-16 12:34:29,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301467564] [2022-11-16 12:34:29,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:29,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:34:29,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:29,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:34:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:34:29,750 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:34:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:30,381 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2022-11-16 12:34:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:34:30,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2022-11-16 12:34:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:30,386 INFO L225 Difference]: With dead ends: 102 [2022-11-16 12:34:30,386 INFO L226 Difference]: Without dead ends: 100 [2022-11-16 12:34:30,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:34:30,387 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 235 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:30,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 192 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 179 Invalid, 0 Unknown, 37 Unchecked, 0.5s Time] [2022-11-16 12:34:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-16 12:34:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2022-11-16 12:34:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 states have internal predecessors, (72), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:34:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 102 transitions. [2022-11-16 12:34:30,431 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 102 transitions. Word has length 43 [2022-11-16 12:34:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:30,431 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 102 transitions. [2022-11-16 12:34:30,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:34:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 102 transitions. [2022-11-16 12:34:30,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:34:30,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:30,434 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:30,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:30,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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)] Ended with exit code 0 [2022-11-16 12:34:30,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:30,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:30,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1642596351, now seen corresponding path program 1 times [2022-11-16 12:34:30,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:30,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373675307] [2022-11-16 12:34:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:30,841 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 [2022-11-16 12:34:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:30,844 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:30,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:30,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:34:30,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:31,118 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 [2022-11-16 12:34:31,254 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 [2022-11-16 12:34:31,372 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 [2022-11-16 12:34:31,480 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 [2022-11-16 12:34:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:31,590 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 [2022-11-16 12:34:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:34:31,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:31,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:31,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373675307] [2022-11-16 12:34:31,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373675307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:31,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [300287123] [2022-11-16 12:34:31,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:31,934 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:31,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:34:31,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:34:31,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-16 12:34:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:32,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:34:32,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:32,406 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 [2022-11-16 12:34:32,496 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 [2022-11-16 12:34:32,599 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 [2022-11-16 12:34:32,713 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 [2022-11-16 12:34:32,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:32,818 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 21 treesize of output 20 [2022-11-16 12:34:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:34:32,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:33,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [300287123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:33,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:33,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-11-16 12:34:33,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34078019] [2022-11-16 12:34:33,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:33,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:34:33,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:33,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:34:33,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:34:33,013 INFO L87 Difference]: Start difference. First operand 72 states and 102 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:34:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:33,564 INFO L93 Difference]: Finished difference Result 134 states and 184 transitions. [2022-11-16 12:34:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:34:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-11-16 12:34:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:33,567 INFO L225 Difference]: With dead ends: 134 [2022-11-16 12:34:33,568 INFO L226 Difference]: Without dead ends: 132 [2022-11-16 12:34:33,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 16 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:34:33,569 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 114 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:33,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 216 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-11-16 12:34:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-16 12:34:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2022-11-16 12:34:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-16 12:34:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-11-16 12:34:33,604 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 43 [2022-11-16 12:34:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:33,605 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-11-16 12:34:33,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:34:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-11-16 12:34:33,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:34:33,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:33,611 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:33,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:33,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:34,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:34,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:34,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:34,025 INFO L85 PathProgramCache]: Analyzing trace with hash 132411011, now seen corresponding path program 1 times [2022-11-16 12:34:34,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:34,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412123383] [2022-11-16 12:34:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:34,026 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 [2022-11-16 12:34:34,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:34,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:34,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:34,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:34:34,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:34,307 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 [2022-11-16 12:34:34,445 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 [2022-11-16 12:34:34,549 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 [2022-11-16 12:34:34,639 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 [2022-11-16 12:34:34,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:34,731 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 [2022-11-16 12:34:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:34:34,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:35,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:35,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412123383] [2022-11-16 12:34:35,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412123383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:35,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2069837693] [2022-11-16 12:34:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:35,104 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:34:35,107 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:34:35,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-16 12:34:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:35,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:34:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:35,723 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 [2022-11-16 12:34:35,817 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 [2022-11-16 12:34:35,926 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 [2022-11-16 12:34:36,027 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 [2022-11-16 12:34:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:36,137 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 [2022-11-16 12:34:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:34:36,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:36,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2069837693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:36,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:36,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-11-16 12:34:36,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336819789] [2022-11-16 12:34:36,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:36,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:34:36,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:36,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:34:36,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:34:36,365 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:34:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:37,225 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2022-11-16 12:34:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:34:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-11-16 12:34:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:37,229 INFO L225 Difference]: With dead ends: 153 [2022-11-16 12:34:37,229 INFO L226 Difference]: Without dead ends: 151 [2022-11-16 12:34:37,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 16 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:34:37,231 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 87 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:37,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 267 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 193 Invalid, 0 Unknown, 23 Unchecked, 0.7s Time] [2022-11-16 12:34:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-16 12:34:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 99. [2022-11-16 12:34:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 73 states have internal predecessors, (97), 22 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 12:34:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 141 transitions. [2022-11-16 12:34:37,280 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 141 transitions. Word has length 43 [2022-11-16 12:34:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:37,283 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 141 transitions. [2022-11-16 12:34:37,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:34:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 141 transitions. [2022-11-16 12:34:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 12:34:37,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:37,289 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:37,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:37,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-16 12:34:37,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:37,704 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1666037387, now seen corresponding path program 1 times [2022-11-16 12:34:37,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:37,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334118057] [2022-11-16 12:34:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:37,706 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 [2022-11-16 12:34:37,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:37,707 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:37,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:37,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:34:37,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:37,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:34:38,040 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 30 treesize of output 29 [2022-11-16 12:34:38,091 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 30 treesize of output 29 [2022-11-16 12:34:38,137 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 [2022-11-16 12:34:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:34:38,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:38,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:38,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334118057] [2022-11-16 12:34:38,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334118057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:38,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1873233218] [2022-11-16 12:34:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:38,583 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:38,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:34:38,584 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:34:38,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-16 12:34:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:39,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:34:39,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:39,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:34:39,428 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 30 treesize of output 29 [2022-11-16 12:34:39,570 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 30 treesize of output 29 [2022-11-16 12:34:39,702 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 [2022-11-16 12:34:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:34:39,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:40,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1873233218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:40,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:40,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-11-16 12:34:40,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580066308] [2022-11-16 12:34:40,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:40,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:34:40,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:34:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:34:40,117 INFO L87 Difference]: Start difference. First operand 99 states and 141 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:34:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:40,934 INFO L93 Difference]: Finished difference Result 184 states and 256 transitions. [2022-11-16 12:34:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:34:40,936 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 47 [2022-11-16 12:34:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:40,937 INFO L225 Difference]: With dead ends: 184 [2022-11-16 12:34:40,937 INFO L226 Difference]: Without dead ends: 182 [2022-11-16 12:34:40,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:34:40,939 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 188 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:40,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 233 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 226 Invalid, 0 Unknown, 49 Unchecked, 0.7s Time] [2022-11-16 12:34:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-16 12:34:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 167. [2022-11-16 12:34:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 122 states have (on average 1.360655737704918) internal successors, (166), 123 states have internal predecessors, (166), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-16 12:34:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 240 transitions. [2022-11-16 12:34:40,994 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 240 transitions. Word has length 47 [2022-11-16 12:34:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:40,994 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 240 transitions. [2022-11-16 12:34:40,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:34:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 240 transitions. [2022-11-16 12:34:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 12:34:40,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:41,000 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:41,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:41,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:41,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:41,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash -279833993, now seen corresponding path program 1 times [2022-11-16 12:34:41,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:41,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595900546] [2022-11-16 12:34:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:41,413 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 [2022-11-16 12:34:41,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:41,414 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:41,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:41,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:34:41,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:41,701 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 [2022-11-16 12:34:41,825 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 29 treesize of output 28 [2022-11-16 12:34:41,929 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 [2022-11-16 12:34:42,024 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 [2022-11-16 12:34:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:34:42,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:42,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:42,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595900546] [2022-11-16 12:34:42,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595900546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:42,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1194701945] [2022-11-16 12:34:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:42,499 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:42,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:34:42,500 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:34:42,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-16 12:34:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:42,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:34:42,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:43,076 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 [2022-11-16 12:34:43,179 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 [2022-11-16 12:34:43,279 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 [2022-11-16 12:34:43,370 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 [2022-11-16 12:34:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:34:43,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1194701945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:43,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:43,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-11-16 12:34:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868527118] [2022-11-16 12:34:43,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:43,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:34:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:34:43,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:34:43,629 INFO L87 Difference]: Start difference. First operand 167 states and 240 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:34:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:44,293 INFO L93 Difference]: Finished difference Result 219 states and 305 transitions. [2022-11-16 12:34:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:34:44,295 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2022-11-16 12:34:44,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:44,296 INFO L225 Difference]: With dead ends: 219 [2022-11-16 12:34:44,297 INFO L226 Difference]: Without dead ends: 217 [2022-11-16 12:34:44,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 14 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:34:44,298 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 97 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:44,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 256 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 22 Unchecked, 0.5s Time] [2022-11-16 12:34:44,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-16 12:34:44,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 172. [2022-11-16 12:34:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 126 states have (on average 1.3571428571428572) internal successors, (171), 127 states have internal predecessors, (171), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-16 12:34:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 245 transitions. [2022-11-16 12:34:44,346 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 245 transitions. Word has length 47 [2022-11-16 12:34:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:44,347 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 245 transitions. [2022-11-16 12:34:44,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:34:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 245 transitions. [2022-11-16 12:34:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 12:34:44,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:44,352 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:44,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:44,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:44,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:44,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash 131088491, now seen corresponding path program 2 times [2022-11-16 12:34:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:44,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845553215] [2022-11-16 12:34:44,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:34:44,758 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 [2022-11-16 12:34:44,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:44,759 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:44,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:44,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:34:44,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:34:44,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:44,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:34:45,040 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 30 treesize of output 29 [2022-11-16 12:34:45,087 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 [2022-11-16 12:34:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:34:45,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:45,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:45,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845553215] [2022-11-16 12:34:45,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845553215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:45,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1710617063] [2022-11-16 12:34:45,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:34:45,616 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:45,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:34:45,617 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:34:45,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-16 12:34:45,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:34:45,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:45,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:34:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:46,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:34:46,247 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 30 treesize of output 29 [2022-11-16 12:34:46,380 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 [2022-11-16 12:34:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:34:46,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:46,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1710617063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:46,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:46,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-11-16 12:34:46,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016361120] [2022-11-16 12:34:46,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:46,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:34:46,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:34:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:34:46,869 INFO L87 Difference]: Start difference. First operand 172 states and 245 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:34:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:47,687 INFO L93 Difference]: Finished difference Result 389 states and 560 transitions. [2022-11-16 12:34:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:34:47,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 51 [2022-11-16 12:34:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:47,694 INFO L225 Difference]: With dead ends: 389 [2022-11-16 12:34:47,694 INFO L226 Difference]: Without dead ends: 387 [2022-11-16 12:34:47,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:34:47,696 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 154 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:47,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 298 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 270 Invalid, 0 Unknown, 35 Unchecked, 0.7s Time] [2022-11-16 12:34:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-16 12:34:47,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 360. [2022-11-16 12:34:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 262 states have (on average 1.3893129770992367) internal successors, (364), 263 states have internal predecessors, (364), 84 states have call successors, (84), 13 states have call predecessors, (84), 13 states have return successors, (84), 83 states have call predecessors, (84), 84 states have call successors, (84) [2022-11-16 12:34:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 532 transitions. [2022-11-16 12:34:47,771 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 532 transitions. Word has length 51 [2022-11-16 12:34:47,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:47,772 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 532 transitions. [2022-11-16 12:34:47,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:34:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 532 transitions. [2022-11-16 12:34:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 12:34:47,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:47,775 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:47,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:47,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:48,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:48,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2054316525, now seen corresponding path program 1 times [2022-11-16 12:34:48,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:48,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366687900] [2022-11-16 12:34:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:48,180 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 [2022-11-16 12:34:48,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:48,182 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:48,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:48,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:34:48,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:48,438 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 [2022-11-16 12:34:48,558 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 29 treesize of output 28 [2022-11-16 12:34:48,635 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 [2022-11-16 12:34:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:34:48,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:49,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:49,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366687900] [2022-11-16 12:34:49,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366687900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:49,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1169191023] [2022-11-16 12:34:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:49,215 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:49,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:34:49,216 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:34:49,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-16 12:34:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:49,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:34:49,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:49,701 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 [2022-11-16 12:34:49,791 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 [2022-11-16 12:34:49,869 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 [2022-11-16 12:34:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:34:50,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:50,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1169191023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:50,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:50,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-11-16 12:34:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735931681] [2022-11-16 12:34:50,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:50,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:34:50,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:50,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:34:50,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:34:50,197 INFO L87 Difference]: Start difference. First operand 360 states and 532 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:34:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:51,238 INFO L93 Difference]: Finished difference Result 523 states and 758 transitions. [2022-11-16 12:34:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:34:51,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-11-16 12:34:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:51,242 INFO L225 Difference]: With dead ends: 523 [2022-11-16 12:34:51,242 INFO L226 Difference]: Without dead ends: 521 [2022-11-16 12:34:51,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:34:51,244 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 84 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:51,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 416 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 391 Invalid, 0 Unknown, 33 Unchecked, 0.9s Time] [2022-11-16 12:34:51,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-16 12:34:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 439. [2022-11-16 12:34:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 318 states have (on average 1.39937106918239) internal successors, (445), 319 states have internal predecessors, (445), 104 states have call successors, (104), 16 states have call predecessors, (104), 16 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2022-11-16 12:34:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 653 transitions. [2022-11-16 12:34:51,323 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 653 transitions. Word has length 51 [2022-11-16 12:34:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:51,324 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 653 transitions. [2022-11-16 12:34:51,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:34:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 653 transitions. [2022-11-16 12:34:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:34:51,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:51,326 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:51,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:51,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:51,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:51,744 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:51,745 INFO L85 PathProgramCache]: Analyzing trace with hash 881708129, now seen corresponding path program 3 times [2022-11-16 12:34:51,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:51,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353900221] [2022-11-16 12:34:51,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:34:51,745 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 [2022-11-16 12:34:51,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:51,746 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:51,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:51,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:34:51,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:51,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:34:51,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:51,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:34:52,032 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 [2022-11-16 12:34:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:34:52,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:52,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:52,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353900221] [2022-11-16 12:34:52,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353900221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:52,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [211869235] [2022-11-16 12:34:52,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:34:52,624 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:52,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:34:52,625 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:34:52,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-16 12:34:52,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:34:52,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:52,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:34:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:53,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:34:53,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 12:34:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:34:53,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:53,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [211869235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:53,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:53,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2022-11-16 12:34:53,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117040236] [2022-11-16 12:34:53,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:53,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:34:53,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:53,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:34:53,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:34:53,997 INFO L87 Difference]: Start difference. First operand 439 states and 653 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:34:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:56,256 INFO L93 Difference]: Finished difference Result 1464 states and 2222 transitions. [2022-11-16 12:34:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:34:56,257 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2022-11-16 12:34:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:56,263 INFO L225 Difference]: With dead ends: 1464 [2022-11-16 12:34:56,263 INFO L226 Difference]: Without dead ends: 1462 [2022-11-16 12:34:56,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 12:34:56,266 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 308 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:56,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 538 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 753 Invalid, 0 Unknown, 82 Unchecked, 1.7s Time] [2022-11-16 12:34:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-11-16 12:34:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 926. [2022-11-16 12:34:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 670 states have (on average 1.4223880597014926) internal successors, (953), 670 states have internal predecessors, (953), 231 states have call successors, (231), 24 states have call predecessors, (231), 24 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2022-11-16 12:34:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1415 transitions. [2022-11-16 12:34:56,438 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1415 transitions. Word has length 55 [2022-11-16 12:34:56,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:56,439 INFO L495 AbstractCegarLoop]: Abstraction has 926 states and 1415 transitions. [2022-11-16 12:34:56,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:34:56,439 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1415 transitions. [2022-11-16 12:34:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:34:56,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:56,441 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:56,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:56,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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)] Ended with exit code 0 [2022-11-16 12:34:56,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:56,845 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:56,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:56,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1022256739, now seen corresponding path program 1 times [2022-11-16 12:34:56,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:56,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585298978] [2022-11-16 12:34:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:56,846 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 [2022-11-16 12:34:56,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:56,847 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:34:56,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:34:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:56,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:34:56,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:57,143 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 [2022-11-16 12:34:57,253 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 [2022-11-16 12:34:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:34:57,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:57,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:57,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585298978] [2022-11-16 12:34:57,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585298978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:57,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [665563407] [2022-11-16 12:34:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:57,942 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:34:57,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:34:57,942 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:34:57,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-16 12:34:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:58,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:34:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:58,462 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 [2022-11-16 12:34:58,531 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 [2022-11-16 12:34:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:34:58,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:58,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [665563407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:58,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:58,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2022-11-16 12:34:58,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518803183] [2022-11-16 12:34:58,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:58,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:34:58,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:58,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:34:58,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:34:58,953 INFO L87 Difference]: Start difference. First operand 926 states and 1415 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:34:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:59,716 INFO L93 Difference]: Finished difference Result 1017 states and 1513 transitions. [2022-11-16 12:34:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:34:59,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-11-16 12:34:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:59,722 INFO L225 Difference]: With dead ends: 1017 [2022-11-16 12:34:59,722 INFO L226 Difference]: Without dead ends: 1015 [2022-11-16 12:34:59,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:34:59,723 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 104 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:59,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 279 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 213 Invalid, 0 Unknown, 36 Unchecked, 0.5s Time] [2022-11-16 12:34:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-11-16 12:34:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 947. [2022-11-16 12:34:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 684 states have (on average 1.4137426900584795) internal successors, (967), 684 states have internal predecessors, (967), 231 states have call successors, (231), 31 states have call predecessors, (231), 31 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2022-11-16 12:34:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1429 transitions. [2022-11-16 12:34:59,902 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1429 transitions. Word has length 55 [2022-11-16 12:34:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:59,903 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1429 transitions. [2022-11-16 12:34:59,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:34:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1429 transitions. [2022-11-16 12:34:59,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:34:59,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:59,912 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:59,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:35:00,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:00,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:35:00,313 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:35:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1863871831, now seen corresponding path program 4 times [2022-11-16 12:35:00,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:00,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785875260] [2022-11-16 12:35:00,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:35:00,314 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 [2022-11-16 12:35:00,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:00,315 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:35:00,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:35:00,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:35:00,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:00,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:35:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:00,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:35:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:35:00,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:01,186 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 [2022-11-16 12:35:01,189 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 [2022-11-16 12:35:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:35:01,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:01,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785875260] [2022-11-16 12:35:01,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785875260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:01,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:35:01,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2022-11-16 12:35:01,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737642136] [2022-11-16 12:35:01,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:01,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:35:01,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:01,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:35:01,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:35:01,287 INFO L87 Difference]: Start difference. First operand 947 states and 1429 transitions. Second operand has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 19 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:35:10,337 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 [] [2022-11-16 12:35:12,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:35:19,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:35:21,811 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 [] [2022-11-16 12:35:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:21,842 INFO L93 Difference]: Finished difference Result 3347 states and 5201 transitions. [2022-11-16 12:35:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-16 12:35:21,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 19 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2022-11-16 12:35:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:21,860 INFO L225 Difference]: With dead ends: 3347 [2022-11-16 12:35:21,860 INFO L226 Difference]: Without dead ends: 3345 [2022-11-16 12:35:21,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2645 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1051, Invalid=6959, Unknown=0, NotChecked=0, Total=8010 [2022-11-16 12:35:21,865 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 588 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 1064 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 4085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1064 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:21,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 1287 Invalid, 4085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1064 Valid, 3017 Invalid, 4 Unknown, 0 Unchecked, 16.8s Time] [2022-11-16 12:35:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2022-11-16 12:35:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 2099. [2022-11-16 12:35:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 1516 states have (on average 1.445250659630607) internal successors, (2191), 1516 states have internal predecessors, (2191), 551 states have call successors, (551), 31 states have call predecessors, (551), 31 states have return successors, (551), 551 states have call predecessors, (551), 551 states have call successors, (551) [2022-11-16 12:35:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 3293 transitions. [2022-11-16 12:35:22,344 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 3293 transitions. Word has length 59 [2022-11-16 12:35:22,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:22,345 INFO L495 AbstractCegarLoop]: Abstraction has 2099 states and 3293 transitions. [2022-11-16 12:35:22,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 19 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:35:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 3293 transitions. [2022-11-16 12:35:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:35:22,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:22,348 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:22,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:35:22,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:35:22,561 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:35:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:22,561 INFO L85 PathProgramCache]: Analyzing trace with hash 58433497, now seen corresponding path program 1 times [2022-11-16 12:35:22,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:22,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044819633] [2022-11-16 12:35:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:22,562 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 [2022-11-16 12:35:22,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:22,567 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:35:22,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:35:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:22,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:35:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:22,904 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 13 treesize of output 9 [2022-11-16 12:35:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:35:23,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:23,582 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 18 treesize of output 16 [2022-11-16 12:35:23,584 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 22 [2022-11-16 12:35:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:35:23,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:23,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044819633] [2022-11-16 12:35:23,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044819633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:23,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:35:23,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-16 12:35:23,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035094713] [2022-11-16 12:35:23,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:23,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:35:23,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:23,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:35:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:35:23,813 INFO L87 Difference]: Start difference. First operand 2099 states and 3293 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:35:29,635 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 [] [2022-11-16 12:35:31,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:35:36,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:35:38,949 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 [] [2022-11-16 12:35:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:39,257 INFO L93 Difference]: Finished difference Result 3142 states and 4819 transitions. [2022-11-16 12:35:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 12:35:39,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2022-11-16 12:35:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:39,270 INFO L225 Difference]: With dead ends: 3142 [2022-11-16 12:35:39,270 INFO L226 Difference]: Without dead ends: 3140 [2022-11-16 12:35:39,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=862, Invalid=4394, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 12:35:39,274 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 361 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 415 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:39,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 782 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1324 Invalid, 4 Unknown, 0 Unchecked, 12.1s Time] [2022-11-16 12:35:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2022-11-16 12:35:39,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 1147. [2022-11-16 12:35:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 844 states have (on average 1.411137440758294) internal successors, (1191), 844 states have internal predecessors, (1191), 271 states have call successors, (271), 31 states have call predecessors, (271), 31 states have return successors, (271), 271 states have call predecessors, (271), 271 states have call successors, (271) [2022-11-16 12:35:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1733 transitions. [2022-11-16 12:35:39,674 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1733 transitions. Word has length 59 [2022-11-16 12:35:39,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:39,675 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1733 transitions. [2022-11-16 12:35:39,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:35:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1733 transitions. [2022-11-16 12:35:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 12:35:39,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:39,678 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:39,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:35:39,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:35:39,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:35:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:39,891 INFO L85 PathProgramCache]: Analyzing trace with hash 819831629, now seen corresponding path program 5 times [2022-11-16 12:35:39,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:39,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335649231] [2022-11-16 12:35:39,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:35:39,892 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 [2022-11-16 12:35:39,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:39,893 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:35:39,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:35:40,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 12:35:40,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:40,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:35:40,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:35:48,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:35:53,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:53,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335649231] [2022-11-16 12:35:53,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335649231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:53,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:35:53,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-16 12:35:53,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613099683] [2022-11-16 12:35:53,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:53,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:35:53,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:53,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:35:53,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:35:53,317 INFO L87 Difference]: Start difference. First operand 1147 states and 1733 transitions. Second operand has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:36:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:01,463 INFO L93 Difference]: Finished difference Result 1183 states and 1767 transitions. [2022-11-16 12:36:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:36:01,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 63 [2022-11-16 12:36:01,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:01,473 INFO L225 Difference]: With dead ends: 1183 [2022-11-16 12:36:01,473 INFO L226 Difference]: Without dead ends: 1155 [2022-11-16 12:36:01,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=356, Invalid=1126, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 12:36:01,475 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 381 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:01,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 255 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 12:36:01,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-11-16 12:36:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1147. [2022-11-16 12:36:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 844 states have (on average 1.382701421800948) internal successors, (1167), 844 states have internal predecessors, (1167), 271 states have call successors, (271), 31 states have call predecessors, (271), 31 states have return successors, (271), 271 states have call predecessors, (271), 271 states have call successors, (271) [2022-11-16 12:36:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1709 transitions. [2022-11-16 12:36:01,794 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1709 transitions. Word has length 63 [2022-11-16 12:36:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:01,794 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1709 transitions. [2022-11-16 12:36:01,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:36:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1709 transitions. [2022-11-16 12:36:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 12:36:01,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:01,803 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:01,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:36:02,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:36:02,015 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:36:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1865382535, now seen corresponding path program 1 times [2022-11-16 12:36:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:02,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215034872] [2022-11-16 12:36:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:02,016 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 [2022-11-16 12:36:02,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:02,031 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:36:02,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:36:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:36:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:02,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:36:02,304 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 30 treesize of output 29 [2022-11-16 12:36:02,337 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 30 treesize of output 29 [2022-11-16 12:36:02,372 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 30 treesize of output 29 [2022-11-16 12:36:02,412 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 30 treesize of output 29 [2022-11-16 12:36:02,488 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 30 treesize of output 29 [2022-11-16 12:36:02,532 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 30 treesize of output 29 [2022-11-16 12:36:02,569 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 30 treesize of output 29 [2022-11-16 12:36:02,605 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 30 treesize of output 29 [2022-11-16 12:36:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:02,645 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 22 treesize of output 21 [2022-11-16 12:36:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 12:36:02,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:02,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:02,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215034872] [2022-11-16 12:36:02,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215034872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:02,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1243775531] [2022-11-16 12:36:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:02,873 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:02,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:36:02,875 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:36:02,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-16 12:36:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 12:36:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:03,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:36:03,574 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 30 treesize of output 29 [2022-11-16 12:36:03,693 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 30 treesize of output 29 [2022-11-16 12:36:03,801 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 30 treesize of output 29 [2022-11-16 12:36:03,911 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 30 treesize of output 29 [2022-11-16 12:36:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:04,063 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 25 treesize of output 24 [2022-11-16 12:36:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:04,161 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 25 treesize of output 24 [2022-11-16 12:36:04,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:04,253 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 25 treesize of output 24 [2022-11-16 12:36:04,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:04,360 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 25 treesize of output 24 [2022-11-16 12:36:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:04,464 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 22 treesize of output 21 [2022-11-16 12:36:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 12:36:04,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:04,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1243775531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:04,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:04,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-11-16 12:36:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206654203] [2022-11-16 12:36:04,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:04,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:36:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:04,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:36:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:36:04,687 INFO L87 Difference]: Start difference. First operand 1147 states and 1709 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:36:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:05,703 INFO L93 Difference]: Finished difference Result 1417 states and 2103 transitions. [2022-11-16 12:36:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:36:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 75 [2022-11-16 12:36:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:05,709 INFO L225 Difference]: With dead ends: 1417 [2022-11-16 12:36:05,709 INFO L226 Difference]: Without dead ends: 1415 [2022-11-16 12:36:05,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 130 SyntacticMatches, 18 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:36:05,711 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 241 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:05,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 253 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 274 Invalid, 0 Unknown, 61 Unchecked, 0.6s Time] [2022-11-16 12:36:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-11-16 12:36:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1150. [2022-11-16 12:36:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 846 states have (on average 1.3817966903073287) internal successors, (1169), 846 states have internal predecessors, (1169), 271 states have call successors, (271), 32 states have call predecessors, (271), 32 states have return successors, (271), 271 states have call predecessors, (271), 271 states have call successors, (271) [2022-11-16 12:36:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1711 transitions. [2022-11-16 12:36:06,120 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1711 transitions. Word has length 75 [2022-11-16 12:36:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:06,120 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 1711 transitions. [2022-11-16 12:36:06,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:36:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1711 transitions. [2022-11-16 12:36:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 12:36:06,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:06,124 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:06,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:06,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:06,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:36:06,536 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:36:06,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash -327021433, now seen corresponding path program 1 times [2022-11-16 12:36:06,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:06,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621051750] [2022-11-16 12:36:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:06,537 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 [2022-11-16 12:36:06,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:06,538 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:36:06,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:36:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:06,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:36:06,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:06,785 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 [2022-11-16 12:36:06,877 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 29 treesize of output 28 [2022-11-16 12:36:06,951 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 [2022-11-16 12:36:07,024 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 [2022-11-16 12:36:07,098 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 [2022-11-16 12:36:07,225 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 [2022-11-16 12:36:07,305 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 [2022-11-16 12:36:07,406 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 [2022-11-16 12:36:07,494 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 [2022-11-16 12:36:07,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:07,577 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 21 treesize of output 20 [2022-11-16 12:36:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 12:36:07,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:07,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:07,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621051750] [2022-11-16 12:36:07,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621051750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:07,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1113288586] [2022-11-16 12:36:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:07,878 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:36:07,879 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:36:07,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-16 12:36:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:36:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:08,414 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 [2022-11-16 12:36:08,494 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 [2022-11-16 12:36:08,568 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 [2022-11-16 12:36:08,640 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 29 treesize of output 28 [2022-11-16 12:36:08,712 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 [2022-11-16 12:36:08,811 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 [2022-11-16 12:36:08,891 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 [2022-11-16 12:36:08,974 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 [2022-11-16 12:36:09,056 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 [2022-11-16 12:36:09,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:09,136 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 [2022-11-16 12:36:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 12:36:09,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:09,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1113288586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:09,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:09,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-11-16 12:36:09,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011248584] [2022-11-16 12:36:09,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:09,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:36:09,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:36:09,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:36:09,305 INFO L87 Difference]: Start difference. First operand 1150 states and 1711 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:10,496 INFO L93 Difference]: Finished difference Result 1345 states and 1959 transitions. [2022-11-16 12:36:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:36:10,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 75 [2022-11-16 12:36:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:10,502 INFO L225 Difference]: With dead ends: 1345 [2022-11-16 12:36:10,503 INFO L226 Difference]: Without dead ends: 1343 [2022-11-16 12:36:10,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 118 SyntacticMatches, 36 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:36:10,504 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 94 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:10,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 367 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 359 Invalid, 0 Unknown, 46 Unchecked, 0.8s Time] [2022-11-16 12:36:10,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-11-16 12:36:10,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1157. [2022-11-16 12:36:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 852 states have (on average 1.3814553990610328) internal successors, (1177), 852 states have internal predecessors, (1177), 271 states have call successors, (271), 33 states have call predecessors, (271), 33 states have return successors, (271), 271 states have call predecessors, (271), 271 states have call successors, (271) [2022-11-16 12:36:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1719 transitions. [2022-11-16 12:36:10,802 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1719 transitions. Word has length 75 [2022-11-16 12:36:10,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:10,803 INFO L495 AbstractCegarLoop]: Abstraction has 1157 states and 1719 transitions. [2022-11-16 12:36:10,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1719 transitions. [2022-11-16 12:36:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:36:10,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:10,813 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:10,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:11,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-11-16 12:36:11,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:11,227 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:36:11,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:11,227 INFO L85 PathProgramCache]: Analyzing trace with hash 122329213, now seen corresponding path program 1 times [2022-11-16 12:36:11,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:11,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439958070] [2022-11-16 12:36:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:11,228 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 [2022-11-16 12:36:11,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:11,229 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:36:11,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (29)] Waiting until timeout for monitored process [2022-11-16 12:36:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:11,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:36:11,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:11,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:36:11,572 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 30 treesize of output 29 [2022-11-16 12:36:11,614 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 30 treesize of output 29 [2022-11-16 12:36:11,669 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 30 treesize of output 29 [2022-11-16 12:36:11,760 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 30 treesize of output 29 [2022-11-16 12:36:11,800 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 30 treesize of output 29 [2022-11-16 12:36:11,839 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 30 treesize of output 29 [2022-11-16 12:36:11,878 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 30 treesize of output 29 [2022-11-16 12:36:11,916 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 [2022-11-16 12:36:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 12:36:12,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:12,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:12,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439958070] [2022-11-16 12:36:12,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439958070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:12,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [462442715] [2022-11-16 12:36:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:12,289 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:36:12,290 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:36:12,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-16 12:36:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:12,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:36:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:12,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:36:13,042 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 30 treesize of output 29 [2022-11-16 12:36:13,155 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 30 treesize of output 29 [2022-11-16 12:36:13,265 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 30 treesize of output 29 [2022-11-16 12:36:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:13,433 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 27 treesize of output 26 [2022-11-16 12:36:13,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:13,534 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 27 treesize of output 26 [2022-11-16 12:36:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:13,644 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 27 treesize of output 26 [2022-11-16 12:36:13,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:13,750 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 27 treesize of output 26 [2022-11-16 12:36:13,852 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 [2022-11-16 12:36:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 12:36:14,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:14,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [462442715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:14,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:14,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-11-16 12:36:14,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486706257] [2022-11-16 12:36:14,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:14,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:36:14,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:14,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:36:14,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:36:14,169 INFO L87 Difference]: Start difference. First operand 1157 states and 1719 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:36:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:15,207 INFO L93 Difference]: Finished difference Result 1607 states and 2410 transitions. [2022-11-16 12:36:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:36:15,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 79 [2022-11-16 12:36:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:15,211 INFO L225 Difference]: With dead ends: 1607 [2022-11-16 12:36:15,211 INFO L226 Difference]: Without dead ends: 1605 [2022-11-16 12:36:15,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 145 SyntacticMatches, 18 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:36:15,212 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 202 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:15,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 268 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 245 Invalid, 0 Unknown, 36 Unchecked, 0.6s Time] [2022-11-16 12:36:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2022-11-16 12:36:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1163. [2022-11-16 12:36:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 856 states have (on average 1.3796728971962617) internal successors, (1181), 856 states have internal predecessors, (1181), 271 states have call successors, (271), 35 states have call predecessors, (271), 35 states have return successors, (271), 271 states have call predecessors, (271), 271 states have call successors, (271) [2022-11-16 12:36:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1723 transitions. [2022-11-16 12:36:15,642 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1723 transitions. Word has length 79 [2022-11-16 12:36:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:15,643 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1723 transitions. [2022-11-16 12:36:15,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:36:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1723 transitions. [2022-11-16 12:36:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:36:15,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:15,647 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:15,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (29)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:15,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-16 12:36:16,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:16,061 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:36:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:16,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1382839293, now seen corresponding path program 1 times [2022-11-16 12:36:16,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:16,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451488184] [2022-11-16 12:36:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:16,062 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 [2022-11-16 12:36:16,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:16,063 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:36:16,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (31)] Waiting until timeout for monitored process [2022-11-16 12:36:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:16,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:36:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:16,374 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 [2022-11-16 12:36:16,495 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 [2022-11-16 12:36:16,570 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 [2022-11-16 12:36:16,651 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 [2022-11-16 12:36:16,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:16,769 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 [2022-11-16 12:36:16,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:16,848 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 [2022-11-16 12:36:16,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:16,921 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 [2022-11-16 12:36:16,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:16,999 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 [2022-11-16 12:36:17,071 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 [2022-11-16 12:36:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 12:36:17,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:17,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:17,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451488184] [2022-11-16 12:36:17,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451488184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:17,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1990776099] [2022-11-16 12:36:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:17,484 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:17,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:36:17,485 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:36:17,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-16 12:36:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:36:18,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:18,105 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 [2022-11-16 12:36:18,178 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 [2022-11-16 12:36:18,256 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 [2022-11-16 12:36:18,342 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 [2022-11-16 12:36:18,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:18,441 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 [2022-11-16 12:36:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:18,522 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 [2022-11-16 12:36:18,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:18,607 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 [2022-11-16 12:36:18,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:18,686 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 [2022-11-16 12:36:18,756 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 [2022-11-16 12:36:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 12:36:18,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:19,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1990776099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:19,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:19,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-11-16 12:36:19,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866304375] [2022-11-16 12:36:19,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:19,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:36:19,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:19,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:36:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:36:19,013 INFO L87 Difference]: Start difference. First operand 1163 states and 1723 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:20,219 INFO L93 Difference]: Finished difference Result 1319 states and 1938 transitions. [2022-11-16 12:36:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:36:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 79 [2022-11-16 12:36:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:20,225 INFO L225 Difference]: With dead ends: 1319 [2022-11-16 12:36:20,225 INFO L226 Difference]: Without dead ends: 1317 [2022-11-16 12:36:20,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 135 SyntacticMatches, 34 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:36:20,227 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 93 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:20,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 315 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 42 Unchecked, 0.6s Time] [2022-11-16 12:36:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-11-16 12:36:20,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1207. [2022-11-16 12:36:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 888 states have (on average 1.3795045045045045) internal successors, (1225), 888 states have internal predecessors, (1225), 281 states have call successors, (281), 37 states have call predecessors, (281), 37 states have return successors, (281), 281 states have call predecessors, (281), 281 states have call successors, (281) [2022-11-16 12:36:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1787 transitions. [2022-11-16 12:36:20,713 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1787 transitions. Word has length 79 [2022-11-16 12:36:20,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:20,714 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 1787 transitions. [2022-11-16 12:36:20,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1787 transitions. [2022-11-16 12:36:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:36:20,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:20,719 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:20,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (31)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:20,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:21,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:21,132 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:36:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash 485446015, now seen corresponding path program 1 times [2022-11-16 12:36:21,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:21,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913031614] [2022-11-16 12:36:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:21,133 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 [2022-11-16 12:36:21,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:21,134 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:36:21,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (33)] Waiting until timeout for monitored process [2022-11-16 12:36:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:36:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:21,435 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 [2022-11-16 12:36:21,545 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 29 treesize of output 28 [2022-11-16 12:36:21,620 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 [2022-11-16 12:36:21,697 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 [2022-11-16 12:36:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:21,821 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 [2022-11-16 12:36:21,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:21,898 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 [2022-11-16 12:36:21,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:21,985 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 [2022-11-16 12:36:22,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:22,063 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 [2022-11-16 12:36:22,149 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 [2022-11-16 12:36:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 12:36:22,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:22,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:22,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913031614] [2022-11-16 12:36:22,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913031614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:22,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [658514028] [2022-11-16 12:36:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:22,571 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:22,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:36:22,572 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:36:22,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-16 12:36:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:23,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:36:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:23,193 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 [2022-11-16 12:36:23,286 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 [2022-11-16 12:36:23,369 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 [2022-11-16 12:36:23,484 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 [2022-11-16 12:36:23,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:23,603 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 26 treesize of output 25 [2022-11-16 12:36:23,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:23,685 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 [2022-11-16 12:36:23,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:23,759 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 [2022-11-16 12:36:23,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:23,837 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 [2022-11-16 12:36:23,911 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 [2022-11-16 12:36:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 12:36:24,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:24,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [658514028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:24,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:24,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-11-16 12:36:24,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500088700] [2022-11-16 12:36:24,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:24,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:36:24,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:24,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:36:24,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:36:24,158 INFO L87 Difference]: Start difference. First operand 1207 states and 1787 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:25,338 INFO L93 Difference]: Finished difference Result 1364 states and 1992 transitions. [2022-11-16 12:36:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:36:25,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 79 [2022-11-16 12:36:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:25,343 INFO L225 Difference]: With dead ends: 1364 [2022-11-16 12:36:25,343 INFO L226 Difference]: Without dead ends: 1362 [2022-11-16 12:36:25,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 134 SyntacticMatches, 35 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:36:25,344 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 78 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:25,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 372 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 338 Invalid, 0 Unknown, 45 Unchecked, 0.7s Time] [2022-11-16 12:36:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2022-11-16 12:36:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1201. [2022-11-16 12:36:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 882 states have (on average 1.3786848072562359) internal successors, (1216), 884 states have internal predecessors, (1216), 281 states have call successors, (281), 37 states have call predecessors, (281), 37 states have return successors, (281), 279 states have call predecessors, (281), 281 states have call successors, (281) [2022-11-16 12:36:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1778 transitions. [2022-11-16 12:36:25,681 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1778 transitions. Word has length 79 [2022-11-16 12:36:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:25,682 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1778 transitions. [2022-11-16 12:36:25,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1778 transitions. [2022-11-16 12:36:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 12:36:25,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:25,685 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:25,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:25,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (33)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:26,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:36:26,091 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:36:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash -144842263, now seen corresponding path program 1 times [2022-11-16 12:36:26,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:26,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079497725] [2022-11-16 12:36:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:26,092 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 [2022-11-16 12:36:26,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:26,093 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:36:26,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (35)] Waiting until timeout for monitored process [2022-11-16 12:36:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:36:26,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:26,489 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 [2022-11-16 12:36:26,587 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 [2022-11-16 12:36:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:26,707 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 [2022-11-16 12:36:26,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:26,781 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 [2022-11-16 12:36:26,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:26,857 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 [2022-11-16 12:36:26,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:26,943 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 [2022-11-16 12:36:27,016 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 [2022-11-16 12:36:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 12:36:27,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:27,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:27,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079497725] [2022-11-16 12:36:27,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079497725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:27,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1104258427] [2022-11-16 12:36:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:27,739 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:36:27,740 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:36:27,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-16 12:36:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:28,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:36:28,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:28,412 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 [2022-11-16 12:36:28,486 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 [2022-11-16 12:36:28,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:28,619 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 [2022-11-16 12:36:28,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:28,686 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 [2022-11-16 12:36:28,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:28,762 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 [2022-11-16 12:36:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:28,836 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 26 treesize of output 25 [2022-11-16 12:36:28,908 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 [2022-11-16 12:36:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 12:36:29,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:29,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1104258427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:29,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:29,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2022-11-16 12:36:29,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701940049] [2022-11-16 12:36:29,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:29,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:36:29,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:36:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:36:29,312 INFO L87 Difference]: Start difference. First operand 1201 states and 1778 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:30,712 INFO L93 Difference]: Finished difference Result 1503 states and 2200 transitions. [2022-11-16 12:36:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:36:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2022-11-16 12:36:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:30,719 INFO L225 Difference]: With dead ends: 1503 [2022-11-16 12:36:30,719 INFO L226 Difference]: Without dead ends: 1501 [2022-11-16 12:36:30,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 170 SyntacticMatches, 28 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:36:30,721 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 107 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:30,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 453 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 444 Invalid, 0 Unknown, 47 Unchecked, 0.9s Time] [2022-11-16 12:36:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-16 12:36:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1199. [2022-11-16 12:36:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 876 states have (on average 1.3824200913242009) internal successors, (1211), 878 states have internal predecessors, (1211), 281 states have call successors, (281), 41 states have call predecessors, (281), 41 states have return successors, (281), 279 states have call predecessors, (281), 281 states have call successors, (281) [2022-11-16 12:36:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1773 transitions. [2022-11-16 12:36:31,132 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1773 transitions. Word has length 87 [2022-11-16 12:36:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:31,132 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 1773 transitions. [2022-11-16 12:36:31,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1773 transitions. [2022-11-16 12:36:31,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-16 12:36:31,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:31,136 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:31,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:31,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (35)] Ended with exit code 0 [2022-11-16 12:36:31,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:36:31,541 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:36:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash -375078701, now seen corresponding path program 6 times [2022-11-16 12:36:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:31,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141209253] [2022-11-16 12:36:31,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:36:31,542 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 [2022-11-16 12:36:31,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:31,548 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:36:31,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (37)] Waiting until timeout for monitored process [2022-11-16 12:36:31,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-16 12:36:31,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:36:31,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:36:31,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:31,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:36:32,003 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 30 treesize of output 29 [2022-11-16 12:36:32,041 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 30 treesize of output 29 [2022-11-16 12:36:32,082 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 30 treesize of output 29 [2022-11-16 12:36:32,122 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 24 treesize of output 23 [2022-11-16 12:36:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 12:36:32,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:33,062 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:33,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141209253] [2022-11-16 12:36:33,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141209253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:33,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [109379349] [2022-11-16 12:36:33,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:36:33,063 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:33,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:36:33,064 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:36:33,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-16 12:36:33,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:36:33,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 1 [2022-11-16 12:36:33,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014921732] [2022-11-16 12:36:33,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:36:33,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:36:33,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:36:33,553 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:36:33,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 12:36:34,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-16 12:36:34,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:36:34,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:36:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:34,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:36:34,362 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 30 treesize of output 29 [2022-11-16 12:36:34,405 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 30 treesize of output 29 [2022-11-16 12:36:34,444 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 30 treesize of output 29 [2022-11-16 12:36:34,501 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 [2022-11-16 12:36:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 12:36:34,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:35,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014921732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:35,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:35,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2022-11-16 12:36:35,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87621629] [2022-11-16 12:36:35,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:35,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:36:35,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:36:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:36:35,138 INFO L87 Difference]: Start difference. First operand 1199 states and 1773 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:38,335 INFO L93 Difference]: Finished difference Result 2671 states and 4102 transitions. [2022-11-16 12:36:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:36:38,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2022-11-16 12:36:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:38,345 INFO L225 Difference]: With dead ends: 2671 [2022-11-16 12:36:38,346 INFO L226 Difference]: Without dead ends: 2669 [2022-11-16 12:36:38,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:36:38,348 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 209 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:38,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 638 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 12:36:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2022-11-16 12:36:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2563. [2022-11-16 12:36:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 1848 states have (on average 1.4312770562770563) internal successors, (2645), 1852 states have internal predecessors, (2645), 673 states have call successors, (673), 41 states have call predecessors, (673), 41 states have return successors, (673), 669 states have call predecessors, (673), 673 states have call successors, (673) [2022-11-16 12:36:39,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 3991 transitions. [2022-11-16 12:36:39,130 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 3991 transitions. Word has length 95 [2022-11-16 12:36:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:39,131 INFO L495 AbstractCegarLoop]: Abstraction has 2563 states and 3991 transitions. [2022-11-16 12:36:39,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 3991 transitions. [2022-11-16 12:36:39,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-16 12:36:39,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:39,136 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:39,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (37)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:39,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-16 12:36:39,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:36:39,550 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:36:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1891302485, now seen corresponding path program 1 times [2022-11-16 12:36:39,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:39,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654115631] [2022-11-16 12:36:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:39,551 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 [2022-11-16 12:36:39,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:39,552 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:36:39,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (40)] Waiting until timeout for monitored process [2022-11-16 12:36:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:39,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:36:39,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:40,047 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 [2022-11-16 12:36:40,167 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 [2022-11-16 12:36:40,252 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 [2022-11-16 12:36:40,330 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 [2022-11-16 12:36:40,407 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 [2022-11-16 12:36:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 12:36:40,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:41,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:41,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654115631] [2022-11-16 12:36:41,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654115631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:41,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1168321817] [2022-11-16 12:36:41,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:41,518 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:41,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:36:41,519 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:36:41,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-16 12:36:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:42,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:36:42,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:42,355 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 [2022-11-16 12:36:42,434 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 [2022-11-16 12:36:42,518 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 [2022-11-16 12:36:42,598 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 [2022-11-16 12:36:42,679 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 23 treesize of output 22 [2022-11-16 12:36:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 12:36:43,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:43,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1168321817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:43,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:43,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2022-11-16 12:36:43,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244316210] [2022-11-16 12:36:43,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:43,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:36:43,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:43,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:36:43,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:36:43,327 INFO L87 Difference]: Start difference. First operand 2563 states and 3991 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:45,224 INFO L93 Difference]: Finished difference Result 2713 states and 4153 transitions. [2022-11-16 12:36:45,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:36:45,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2022-11-16 12:36:45,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:45,236 INFO L225 Difference]: With dead ends: 2713 [2022-11-16 12:36:45,236 INFO L226 Difference]: Without dead ends: 2711 [2022-11-16 12:36:45,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 204 SyntacticMatches, 21 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:36:45,238 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 137 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:45,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 557 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 539 Invalid, 0 Unknown, 45 Unchecked, 0.9s Time] [2022-11-16 12:36:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2022-11-16 12:36:46,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2593. [2022-11-16 12:36:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 1868 states have (on average 1.426659528907923) internal successors, (2665), 1872 states have internal predecessors, (2665), 673 states have call successors, (673), 51 states have call predecessors, (673), 51 states have return successors, (673), 669 states have call predecessors, (673), 673 states have call successors, (673) [2022-11-16 12:36:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 4011 transitions. [2022-11-16 12:36:46,126 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 4011 transitions. Word has length 95 [2022-11-16 12:36:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:46,127 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 4011 transitions. [2022-11-16 12:36:46,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:36:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 4011 transitions. [2022-11-16 12:36:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-16 12:36:46,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:46,133 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:46,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:46,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (40)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:46,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:36:46,548 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:36:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash 500947145, now seen corresponding path program 7 times [2022-11-16 12:36:46,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:46,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311124057] [2022-11-16 12:36:46,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:36:46,549 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 [2022-11-16 12:36:46,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:46,550 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:36:46,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (42)] Waiting until timeout for monitored process [2022-11-16 12:36:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:36:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:46,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:36:46,989 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 30 treesize of output 29 [2022-11-16 12:36:47,027 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 30 treesize of output 29 [2022-11-16 12:36:47,065 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 [2022-11-16 12:36:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 12:36:47,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:48,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:48,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311124057] [2022-11-16 12:36:48,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311124057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:48,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1244125424] [2022-11-16 12:36:48,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:36:48,112 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:48,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:36:48,113 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:36:48,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-16 12:36:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:48,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:36:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:49,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:36:49,219 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 30 treesize of output 29 [2022-11-16 12:36:49,373 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 30 treesize of output 29 [2022-11-16 12:36:49,528 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 [2022-11-16 12:36:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-16 12:36:50,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:50,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1244125424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:50,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:50,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-11-16 12:36:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91399170] [2022-11-16 12:36:50,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:50,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:36:50,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:36:50,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:36:50,572 INFO L87 Difference]: Start difference. First operand 2593 states and 4011 transitions. Second operand has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:36:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:55,262 INFO L93 Difference]: Finished difference Result 6051 states and 9447 transitions. [2022-11-16 12:36:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:36:55,263 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 99 [2022-11-16 12:36:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:55,279 INFO L225 Difference]: With dead ends: 6051 [2022-11-16 12:36:55,279 INFO L226 Difference]: Without dead ends: 6049 [2022-11-16 12:36:55,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 12:36:55,281 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 249 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:55,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1130 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1692 Invalid, 0 Unknown, 55 Unchecked, 2.5s Time] [2022-11-16 12:36:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6049 states. [2022-11-16 12:36:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6049 to 5841. [2022-11-16 12:36:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5841 states, 4188 states have (on average 1.4491404011461317) internal successors, (6069), 4196 states have internal predecessors, (6069), 1581 states have call successors, (1581), 71 states have call predecessors, (1581), 71 states have return successors, (1581), 1573 states have call predecessors, (1581), 1581 states have call successors, (1581) [2022-11-16 12:36:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5841 states to 5841 states and 9231 transitions. [2022-11-16 12:36:57,235 INFO L78 Accepts]: Start accepts. Automaton has 5841 states and 9231 transitions. Word has length 99 [2022-11-16 12:36:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:57,236 INFO L495 AbstractCegarLoop]: Abstraction has 5841 states and 9231 transitions. [2022-11-16 12:36:57,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:36:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5841 states and 9231 transitions. [2022-11-16 12:36:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-16 12:36:57,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:57,244 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:57,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (42)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:57,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:57,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:57,658 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:36:57,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:57,659 INFO L85 PathProgramCache]: Analyzing trace with hash 485428427, now seen corresponding path program 2 times [2022-11-16 12:36:57,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:57,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043873949] [2022-11-16 12:36:57,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:36:57,659 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 [2022-11-16 12:36:57,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:57,660 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:36:57,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (44)] Waiting until timeout for monitored process [2022-11-16 12:36:57,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:36:57,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:36:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:36:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:58,209 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 [2022-11-16 12:36:58,325 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 [2022-11-16 12:36:58,404 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 [2022-11-16 12:36:58,483 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 [2022-11-16 12:36:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-16 12:36:59,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:59,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:59,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043873949] [2022-11-16 12:36:59,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043873949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:59,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1729173950] [2022-11-16 12:36:59,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:36:59,687 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:36:59,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:36:59,688 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:36:59,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-16 12:37:00,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:37:00,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:00,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:37:00,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:00,373 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 [2022-11-16 12:37:00,459 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 [2022-11-16 12:37:00,541 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 [2022-11-16 12:37:00,621 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 [2022-11-16 12:37:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-16 12:37:00,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:01,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1729173950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:01,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:01,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2022-11-16 12:37:01,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854555095] [2022-11-16 12:37:01,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:01,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:37:01,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:01,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:37:01,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:37:01,346 INFO L87 Difference]: Start difference. First operand 5841 states and 9231 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:37:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:06,052 INFO L93 Difference]: Finished difference Result 7573 states and 11786 transitions. [2022-11-16 12:37:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:37:06,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 99 [2022-11-16 12:37:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:06,076 INFO L225 Difference]: With dead ends: 7573 [2022-11-16 12:37:06,076 INFO L226 Difference]: Without dead ends: 7571 [2022-11-16 12:37:06,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 224 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:37:06,080 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 182 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:06,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 919 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1211 Invalid, 0 Unknown, 61 Unchecked, 2.0s Time] [2022-11-16 12:37:06,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2022-11-16 12:37:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 7037. [2022-11-16 12:37:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7037 states, 5044 states have (on average 1.4538065027755749) internal successors, (7333), 5052 states have internal predecessors, (7333), 1901 states have call successors, (1901), 91 states have call predecessors, (1901), 91 states have return successors, (1901), 1893 states have call predecessors, (1901), 1901 states have call successors, (1901) [2022-11-16 12:37:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 11135 transitions. [2022-11-16 12:37:08,643 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 11135 transitions. Word has length 99 [2022-11-16 12:37:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:08,643 INFO L495 AbstractCegarLoop]: Abstraction has 7037 states and 11135 transitions. [2022-11-16 12:37:08,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:37:08,643 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 11135 transitions. [2022-11-16 12:37:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-16 12:37:08,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:08,651 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:08,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:08,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (44)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:09,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:37:09,056 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:37:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:09,056 INFO L85 PathProgramCache]: Analyzing trace with hash -439845107, now seen corresponding path program 2 times [2022-11-16 12:37:09,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:37:09,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665571670] [2022-11-16 12:37:09,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:37:09,057 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 [2022-11-16 12:37:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:37:09,058 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:37:09,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (46)] Waiting until timeout for monitored process [2022-11-16 12:37:09,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:37:09,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:09,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:37:09,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:09,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:37:09,417 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 30 treesize of output 29 [2022-11-16 12:37:09,463 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 30 treesize of output 29 [2022-11-16 12:37:09,499 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 30 treesize of output 29 [2022-11-16 12:37:09,537 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 30 treesize of output 29 [2022-11-16 12:37:09,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:09,608 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 25 treesize of output 24 [2022-11-16 12:37:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:09,643 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 25 treesize of output 24 [2022-11-16 12:37:09,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:09,677 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 25 treesize of output 24 [2022-11-16 12:37:09,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:09,714 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 25 treesize of output 24 [2022-11-16 12:37:09,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:09,742 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 25 treesize of output 24 [2022-11-16 12:37:09,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:09,808 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 25 treesize of output 24 [2022-11-16 12:37:09,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:09,841 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 25 treesize of output 24 [2022-11-16 12:37:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:09,875 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 25 treesize of output 24 [2022-11-16 12:37:09,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:09,912 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 25 treesize of output 24 [2022-11-16 12:37:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:09,942 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 22 treesize of output 21 [2022-11-16 12:37:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-16 12:37:10,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:10,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665571670] [2022-11-16 12:37:10,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665571670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [42249646] [2022-11-16 12:37:10,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:37:10,176 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:37:10,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:37:10,177 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:37:10,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-16 12:37:10,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:37:10,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:10,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 12:37:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:10,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:37:10,863 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 30 treesize of output 29 [2022-11-16 12:37:10,977 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 30 treesize of output 29 [2022-11-16 12:37:11,118 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 30 treesize of output 29 [2022-11-16 12:37:11,230 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 30 treesize of output 29 [2022-11-16 12:37:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:11,386 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 25 treesize of output 24 [2022-11-16 12:37:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:11,493 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 25 treesize of output 24 [2022-11-16 12:37:11,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:11,603 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 25 treesize of output 24 [2022-11-16 12:37:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:11,705 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 25 treesize of output 24 [2022-11-16 12:37:11,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:11,809 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 25 treesize of output 24 [2022-11-16 12:37:11,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:11,975 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 25 treesize of output 24 [2022-11-16 12:37:12,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:12,082 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 25 treesize of output 24 [2022-11-16 12:37:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:12,187 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 25 treesize of output 24 [2022-11-16 12:37:12,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:12,294 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 25 treesize of output 24 [2022-11-16 12:37:12,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:12,399 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 22 treesize of output 21 [2022-11-16 12:37:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-16 12:37:12,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:12,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [42249646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:12,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:12,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-11-16 12:37:12,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805862500] [2022-11-16 12:37:12,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:12,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:37:12,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:12,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:37:12,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:37:12,628 INFO L87 Difference]: Start difference. First operand 7037 states and 11135 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-16 12:37:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:16,277 INFO L93 Difference]: Finished difference Result 7998 states and 12548 transitions. [2022-11-16 12:37:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:37:16,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 107 [2022-11-16 12:37:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:16,299 INFO L225 Difference]: With dead ends: 7998 [2022-11-16 12:37:16,300 INFO L226 Difference]: Without dead ends: 7996 [2022-11-16 12:37:16,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 182 SyntacticMatches, 28 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:37:16,303 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 182 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:16,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 449 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 546 Invalid, 0 Unknown, 47 Unchecked, 1.0s Time] [2022-11-16 12:37:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7996 states. [2022-11-16 12:37:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7996 to 7040. [2022-11-16 12:37:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7040 states, 5046 states have (on average 1.4536266349583828) internal successors, (7335), 5054 states have internal predecessors, (7335), 1901 states have call successors, (1901), 92 states have call predecessors, (1901), 92 states have return successors, (1901), 1893 states have call predecessors, (1901), 1901 states have call successors, (1901) [2022-11-16 12:37:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7040 states to 7040 states and 11137 transitions. [2022-11-16 12:37:18,934 INFO L78 Accepts]: Start accepts. Automaton has 7040 states and 11137 transitions. Word has length 107 [2022-11-16 12:37:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:18,934 INFO L495 AbstractCegarLoop]: Abstraction has 7040 states and 11137 transitions. [2022-11-16 12:37:18,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-16 12:37:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 7040 states and 11137 transitions. [2022-11-16 12:37:18,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-16 12:37:18,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:18,972 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:18,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:19,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (46)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:19,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:37:19,373 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:37:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:19,373 INFO L85 PathProgramCache]: Analyzing trace with hash -863467251, now seen corresponding path program 2 times [2022-11-16 12:37:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:37:19,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339190701] [2022-11-16 12:37:19,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:37:19,374 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 [2022-11-16 12:37:19,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:37:19,375 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:37:19,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (48)] Waiting until timeout for monitored process [2022-11-16 12:37:19,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:37:19,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:19,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 12:37:19,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:19,776 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 [2022-11-16 12:37:19,884 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 [2022-11-16 12:37:19,965 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 [2022-11-16 12:37:20,046 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 [2022-11-16 12:37:20,131 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 [2022-11-16 12:37:20,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:20,247 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 [2022-11-16 12:37:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:20,322 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 24 treesize of output 23 [2022-11-16 12:37:20,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:20,393 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 [2022-11-16 12:37:20,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:20,465 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 [2022-11-16 12:37:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:20,543 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 [2022-11-16 12:37:20,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:20,663 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 [2022-11-16 12:37:20,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:20,741 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 [2022-11-16 12:37:20,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:20,807 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 [2022-11-16 12:37:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:20,882 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 [2022-11-16 12:37:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:20,953 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 [2022-11-16 12:37:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-16 12:37:21,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:21,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:21,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339190701] [2022-11-16 12:37:21,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339190701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:21,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1856653754] [2022-11-16 12:37:21,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:37:21,228 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:37:21,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:37:21,229 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:37:21,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-16 12:37:21,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:37:21,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:21,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 12:37:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:21,742 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 [2022-11-16 12:37:21,816 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 [2022-11-16 12:37:21,891 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 [2022-11-16 12:37:21,967 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 29 treesize of output 28 [2022-11-16 12:37:22,044 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 [2022-11-16 12:37:22,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:22,155 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 [2022-11-16 12:37:22,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:22,242 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 24 treesize of output 23 [2022-11-16 12:37:22,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:22,341 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 [2022-11-16 12:37:22,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:22,418 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 [2022-11-16 12:37:22,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:22,489 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 [2022-11-16 12:37:22,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:22,592 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 [2022-11-16 12:37:22,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:22,663 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 [2022-11-16 12:37:22,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:22,742 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 [2022-11-16 12:37:22,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:22,823 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 [2022-11-16 12:37:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:37:22,907 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 [2022-11-16 12:37:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-16 12:37:22,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:23,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1856653754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:23,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:23,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2022-11-16 12:37:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377942767] [2022-11-16 12:37:23,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:23,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:37:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:37:23,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:37:23,080 INFO L87 Difference]: Start difference. First operand 7040 states and 11137 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-16 12:37:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:26,574 INFO L93 Difference]: Finished difference Result 7604 states and 11903 transitions. [2022-11-16 12:37:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:37:26,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 107 [2022-11-16 12:37:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:26,596 INFO L225 Difference]: With dead ends: 7604 [2022-11-16 12:37:26,596 INFO L226 Difference]: Without dead ends: 7602 [2022-11-16 12:37:26,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 160 SyntacticMatches, 57 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:37:26,601 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 133 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:26,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 454 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 513 Invalid, 0 Unknown, 44 Unchecked, 1.0s Time] [2022-11-16 12:37:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2022-11-16 12:37:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7043. [2022-11-16 12:37:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7043 states, 5048 states have (on average 1.453446909667195) internal successors, (7337), 5056 states have internal predecessors, (7337), 1901 states have call successors, (1901), 93 states have call predecessors, (1901), 93 states have return successors, (1901), 1893 states have call predecessors, (1901), 1901 states have call successors, (1901) [2022-11-16 12:37:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7043 states to 7043 states and 11139 transitions. [2022-11-16 12:37:29,278 INFO L78 Accepts]: Start accepts. Automaton has 7043 states and 11139 transitions. Word has length 107 [2022-11-16 12:37:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:29,279 INFO L495 AbstractCegarLoop]: Abstraction has 7043 states and 11139 transitions. [2022-11-16 12:37:29,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-16 12:37:29,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7043 states and 11139 transitions. [2022-11-16 12:37:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 12:37:29,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:29,286 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:29,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-16 12:37:29,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (48)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:29,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:37:29,691 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:37:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1338374721, now seen corresponding path program 8 times [2022-11-16 12:37:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:37:29,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44204753] [2022-11-16 12:37:29,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:37:29,692 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 [2022-11-16 12:37:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:37:29,695 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:37:29,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (50)] Waiting until timeout for monitored process [2022-11-16 12:37:29,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:37:29,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:30,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:37:30,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:30,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:37:30,198 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 30 treesize of output 29 [2022-11-16 12:37:30,245 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 [2022-11-16 12:37:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 12:37:30,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:31,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:31,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44204753] [2022-11-16 12:37:31,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44204753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:31,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876554350] [2022-11-16 12:37:31,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:37:31,496 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:37:31,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:37:31,497 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:37:31,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-16 12:37:31,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:37:31,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:31,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:37:31,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:32,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:37:32,499 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 30 treesize of output 29 [2022-11-16 12:37:32,667 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 [2022-11-16 12:37:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 12:37:33,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:33,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [876554350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:33,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:33,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2022-11-16 12:37:33,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539741636] [2022-11-16 12:37:33,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:33,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:37:33,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:37:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 12:37:33,892 INFO L87 Difference]: Start difference. First operand 7043 states and 11139 transitions. Second operand has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:37:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:42,104 INFO L93 Difference]: Finished difference Result 14759 states and 23376 transitions. [2022-11-16 12:37:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:37:42,106 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 103 [2022-11-16 12:37:42,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:42,138 INFO L225 Difference]: With dead ends: 14759 [2022-11-16 12:37:42,139 INFO L226 Difference]: Without dead ends: 14757 [2022-11-16 12:37:42,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 237 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:37:42,145 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 512 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 2074 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:42,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1334 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2074 Invalid, 0 Unknown, 132 Unchecked, 3.2s Time] [2022-11-16 12:37:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14757 states. [2022-11-16 12:37:47,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14757 to 14423. [2022-11-16 12:37:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14423 states, 10324 states have (on average 1.4621270825261528) internal successors, (15095), 10340 states have internal predecessors, (15095), 3965 states have call successors, (3965), 133 states have call predecessors, (3965), 133 states have return successors, (3965), 3949 states have call predecessors, (3965), 3965 states have call successors, (3965) [2022-11-16 12:37:47,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14423 states to 14423 states and 23025 transitions. [2022-11-16 12:37:47,645 INFO L78 Accepts]: Start accepts. Automaton has 14423 states and 23025 transitions. Word has length 103 [2022-11-16 12:37:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:47,646 INFO L495 AbstractCegarLoop]: Abstraction has 14423 states and 23025 transitions. [2022-11-16 12:37:47,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:37:47,646 INFO L276 IsEmpty]: Start isEmpty. Operand 14423 states and 23025 transitions. [2022-11-16 12:37:47,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 12:37:47,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:47,654 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:47,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (50)] Ended with exit code 0 [2022-11-16 12:37:47,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-11-16 12:37:48,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:37:48,055 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:37:48,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1691463103, now seen corresponding path program 1 times [2022-11-16 12:37:48,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:37:48,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391445523] [2022-11-16 12:37:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:48,056 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 [2022-11-16 12:37:48,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:37:48,056 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:37:48,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (52)] Waiting until timeout for monitored process [2022-11-16 12:37:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:48,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:37:48,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:48,700 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 [2022-11-16 12:37:48,806 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 [2022-11-16 12:37:48,886 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 [2022-11-16 12:37:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 12:37:49,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:50,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:50,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391445523] [2022-11-16 12:37:50,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391445523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:50,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989039199] [2022-11-16 12:37:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:50,292 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:37:50,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:37:50,295 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:37:50,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-16 12:37:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:50,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:37:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:51,257 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 [2022-11-16 12:37:51,341 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 [2022-11-16 12:37:51,427 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 23 treesize of output 22 [2022-11-16 12:37:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 12:37:51,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:52,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [989039199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:52,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:52,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2022-11-16 12:37:52,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527984242] [2022-11-16 12:37:52,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:52,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:37:52,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:52,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:37:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:37:52,203 INFO L87 Difference]: Start difference. First operand 14423 states and 23025 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:37:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:57,772 INFO L93 Difference]: Finished difference Result 15081 states and 23877 transitions. [2022-11-16 12:37:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:37:57,773 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2022-11-16 12:37:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:57,803 INFO L225 Difference]: With dead ends: 15081 [2022-11-16 12:37:57,804 INFO L226 Difference]: Without dead ends: 15079 [2022-11-16 12:37:57,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 242 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:37:57,810 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 129 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:57,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 474 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 338 Invalid, 0 Unknown, 35 Unchecked, 0.6s Time] [2022-11-16 12:37:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15079 states. [2022-11-16 12:38:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15079 to 14871. [2022-11-16 12:38:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14871 states, 10660 states have (on average 1.4595684803001876) internal successors, (15559), 10684 states have internal predecessors, (15559), 4037 states have call successors, (4037), 173 states have call predecessors, (4037), 173 states have return successors, (4037), 4013 states have call predecessors, (4037), 4037 states have call successors, (4037) [2022-11-16 12:38:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14871 states to 14871 states and 23633 transitions. [2022-11-16 12:38:03,140 INFO L78 Accepts]: Start accepts. Automaton has 14871 states and 23633 transitions. Word has length 103 [2022-11-16 12:38:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:38:03,140 INFO L495 AbstractCegarLoop]: Abstraction has 14871 states and 23633 transitions. [2022-11-16 12:38:03,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:38:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 14871 states and 23633 transitions. [2022-11-16 12:38:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 12:38:03,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:38:03,149 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:38:03,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-16 12:38:03,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (52)] Ended with exit code 0 [2022-11-16 12:38:03,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:38:03,550 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:38:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1759498691, now seen corresponding path program 1 times [2022-11-16 12:38:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:38:03,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929121087] [2022-11-16 12:38:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:03,551 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 [2022-11-16 12:38:03,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:38:03,552 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:38:03,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (54)] Waiting until timeout for monitored process [2022-11-16 12:38:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:38:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:04,113 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 [2022-11-16 12:38:04,222 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 [2022-11-16 12:38:04,307 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 [2022-11-16 12:38:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 12:38:04,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:05,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:38:05,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929121087] [2022-11-16 12:38:05,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929121087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:05,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1215534508] [2022-11-16 12:38:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:05,795 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:38:05,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:38:05,799 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:38:05,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-16 12:38:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:38:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:06,792 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 [2022-11-16 12:38:06,877 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 29 treesize of output 28 [2022-11-16 12:38:06,967 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 [2022-11-16 12:38:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 12:38:07,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:07,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1215534508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:07,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:38:07,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2022-11-16 12:38:07,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303286570] [2022-11-16 12:38:07,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:38:07,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:38:07,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:38:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:38:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:38:07,748 INFO L87 Difference]: Start difference. First operand 14871 states and 23633 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:38:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:38:16,009 INFO L93 Difference]: Finished difference Result 17128 states and 26805 transitions. [2022-11-16 12:38:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:38:16,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2022-11-16 12:38:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:38:16,037 INFO L225 Difference]: With dead ends: 17128 [2022-11-16 12:38:16,037 INFO L226 Difference]: Without dead ends: 17126 [2022-11-16 12:38:16,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 241 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:38:16,041 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 202 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:38:16,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 977 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1398 Invalid, 0 Unknown, 58 Unchecked, 2.3s Time] [2022-11-16 12:38:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17126 states. [2022-11-16 12:38:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17126 to 15887. [2022-11-16 12:38:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15887 states, 11316 states have (on average 1.4583775185577943) internal successors, (16503), 11404 states have internal predecessors, (16503), 4357 states have call successors, (4357), 213 states have call predecessors, (4357), 213 states have return successors, (4357), 4269 states have call predecessors, (4357), 4357 states have call successors, (4357) [2022-11-16 12:38:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15887 states to 15887 states and 25217 transitions. [2022-11-16 12:38:21,918 INFO L78 Accepts]: Start accepts. Automaton has 15887 states and 25217 transitions. Word has length 103 [2022-11-16 12:38:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:38:21,918 INFO L495 AbstractCegarLoop]: Abstraction has 15887 states and 25217 transitions. [2022-11-16 12:38:21,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:38:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 15887 states and 25217 transitions. [2022-11-16 12:38:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 12:38:21,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:38:21,928 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:38:21,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (54)] Ended with exit code 0 [2022-11-16 12:38:22,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-16 12:38:22,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:38:22,330 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:38:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:22,331 INFO L85 PathProgramCache]: Analyzing trace with hash -920524285, now seen corresponding path program 2 times [2022-11-16 12:38:22,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:38:22,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153171021] [2022-11-16 12:38:22,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:38:22,331 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 [2022-11-16 12:38:22,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:38:22,332 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:38:22,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (56)] Waiting until timeout for monitored process [2022-11-16 12:38:22,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:38:22,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:38:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 12:38:22,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:22,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:38:22,724 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 30 treesize of output 29 [2022-11-16 12:38:22,764 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 30 treesize of output 29 [2022-11-16 12:38:22,802 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 30 treesize of output 29 [2022-11-16 12:38:22,880 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 30 treesize of output 29 [2022-11-16 12:38:22,917 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 30 treesize of output 29 [2022-11-16 12:38:22,956 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 30 treesize of output 29 [2022-11-16 12:38:22,993 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 30 treesize of output 29 [2022-11-16 12:38:23,034 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 30 treesize of output 29 [2022-11-16 12:38:23,114 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 30 treesize of output 29 [2022-11-16 12:38:23,153 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 30 treesize of output 29 [2022-11-16 12:38:23,193 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 30 treesize of output 29 [2022-11-16 12:38:23,235 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 30 treesize of output 29 [2022-11-16 12:38:23,270 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 [2022-11-16 12:38:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-16 12:38:23,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:23,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:38:23,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153171021] [2022-11-16 12:38:23,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153171021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:23,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [345655656] [2022-11-16 12:38:23,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:38:23,635 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:38:23,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:38:23,636 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:38:23,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-16 12:38:24,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:38:24,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:38:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 12:38:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:24,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:38:24,560 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 30 treesize of output 29 [2022-11-16 12:38:24,679 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 30 treesize of output 29 [2022-11-16 12:38:24,797 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 30 treesize of output 29 [2022-11-16 12:38:25,057 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 30 treesize of output 29 [2022-11-16 12:38:25,186 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 30 treesize of output 29 [2022-11-16 12:38:25,320 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 30 treesize of output 29 [2022-11-16 12:38:25,453 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 30 treesize of output 29 [2022-11-16 12:38:25,574 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 30 treesize of output 29 [2022-11-16 12:38:25,772 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 30 treesize of output 29 [2022-11-16 12:38:25,893 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 30 treesize of output 29 [2022-11-16 12:38:26,037 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 30 treesize of output 29 [2022-11-16 12:38:26,172 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 30 treesize of output 29 [2022-11-16 12:38:26,302 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 [2022-11-16 12:38:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-11-16 12:38:26,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:26,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [345655656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:26,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:38:26,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-11-16 12:38:26,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998310497] [2022-11-16 12:38:26,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:38:26,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:38:26,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:38:26,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:38:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:38:26,641 INFO L87 Difference]: Start difference. First operand 15887 states and 25217 transitions. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-16 12:38:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:38:34,198 INFO L93 Difference]: Finished difference Result 19555 states and 30981 transitions. [2022-11-16 12:38:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:38:34,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 111 [2022-11-16 12:38:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:38:34,231 INFO L225 Difference]: With dead ends: 19555 [2022-11-16 12:38:34,231 INFO L226 Difference]: Without dead ends: 19553 [2022-11-16 12:38:34,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 197 SyntacticMatches, 28 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:38:34,235 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 212 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:38:34,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 381 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 465 Invalid, 0 Unknown, 41 Unchecked, 1.0s Time] [2022-11-16 12:38:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19553 states. [2022-11-16 12:38:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19553 to 15893. [2022-11-16 12:38:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15893 states, 11320 states have (on average 1.4582155477031802) internal successors, (16507), 11408 states have internal predecessors, (16507), 4357 states have call successors, (4357), 215 states have call predecessors, (4357), 215 states have return successors, (4357), 4269 states have call predecessors, (4357), 4357 states have call successors, (4357) [2022-11-16 12:38:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15893 states to 15893 states and 25221 transitions. [2022-11-16 12:38:40,195 INFO L78 Accepts]: Start accepts. Automaton has 15893 states and 25221 transitions. Word has length 111 [2022-11-16 12:38:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:38:40,195 INFO L495 AbstractCegarLoop]: Abstraction has 15893 states and 25221 transitions. [2022-11-16 12:38:40,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-16 12:38:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 15893 states and 25221 transitions. [2022-11-16 12:38:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 12:38:40,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:38:40,204 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:38:40,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-11-16 12:38:40,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (56)] Ended with exit code 0 [2022-11-16 12:38:40,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:38:40,605 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:38:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:40,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1789869443, now seen corresponding path program 3 times [2022-11-16 12:38:40,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:38:40,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518516132] [2022-11-16 12:38:40,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:38:40,606 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 [2022-11-16 12:38:40,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:38:40,607 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:38:40,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (58)] Waiting until timeout for monitored process [2022-11-16 12:38:41,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 12:38:41,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:38:41,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:38:41,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:41,140 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 [2022-11-16 12:38:41,251 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 [2022-11-16 12:38:41,326 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 [2022-11-16 12:38:41,403 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 [2022-11-16 12:38:41,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:41,519 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 [2022-11-16 12:38:41,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:41,592 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 [2022-11-16 12:38:41,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:41,667 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 26 treesize of output 25 [2022-11-16 12:38:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:41,740 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 [2022-11-16 12:38:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:41,818 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 26 treesize of output 25 [2022-11-16 12:38:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:41,937 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 [2022-11-16 12:38:42,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:42,015 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 [2022-11-16 12:38:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:42,093 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 [2022-11-16 12:38:42,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:42,174 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 [2022-11-16 12:38:42,256 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 [2022-11-16 12:38:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-11-16 12:38:42,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:42,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:38:42,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518516132] [2022-11-16 12:38:42,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518516132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:42,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1101552989] [2022-11-16 12:38:42,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:38:42,701 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:38:42,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:38:42,702 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:38:42,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-16 12:38:43,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:38:43,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880848567] [2022-11-16 12:38:43,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:38:43,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:43,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:38:43,198 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:38:43,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 1 [2022-11-16 12:38:43,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-16 12:38:49,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 12:38:49,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:38:49,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-16 12:38:49,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:49,404 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 [2022-11-16 12:38:49,504 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 [2022-11-16 12:38:49,599 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 [2022-11-16 12:38:49,691 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 [2022-11-16 12:38:49,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:49,806 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 [2022-11-16 12:38:49,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:49,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 12:38:50,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:50,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:50,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:50,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 41 [2022-11-16 12:38:50,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:50,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:50,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:50,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:50,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2022-11-16 12:38:50,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:50,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:50,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:50,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:50,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2022-11-16 12:38:51,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:51,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:51,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:51,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:51,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:51,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:51,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 89 [2022-11-16 12:38:52,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:52,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 89 [2022-11-16 12:38:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:52,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:52,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 22 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 105 [2022-11-16 12:38:53,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:53,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:53,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:53,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:53,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:53,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:53,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:38:53,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:53,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 29 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 121 [2022-11-16 12:38:54,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:54,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 37 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 93 treesize of output 113 [2022-11-16 12:38:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 279 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 12:38:55,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:55,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880848567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:55,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:38:55,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 27] total 30 [2022-11-16 12:38:55,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331339131] [2022-11-16 12:38:55,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:38:55,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:38:55,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:38:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:38:55,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:38:55,736 INFO L87 Difference]: Start difference. First operand 15893 states and 25221 transitions. Second operand has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-11-16 12:39:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:04,328 INFO L93 Difference]: Finished difference Result 17908 states and 28267 transitions. [2022-11-16 12:39:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:39:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) Word has length 111 [2022-11-16 12:39:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:04,368 INFO L225 Difference]: With dead ends: 17908 [2022-11-16 12:39:04,368 INFO L226 Difference]: Without dead ends: 17906 [2022-11-16 12:39:04,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 167 SyntacticMatches, 45 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 12:39:04,373 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 190 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:04,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 936 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 661 Invalid, 0 Unknown, 276 Unchecked, 2.1s Time] [2022-11-16 12:39:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17906 states. [2022-11-16 12:39:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17906 to 16735. [2022-11-16 12:39:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16735 states, 11900 states have (on average 1.4573949579831933) internal successors, (17343), 12008 states have internal predecessors, (17343), 4585 states have call successors, (4585), 249 states have call predecessors, (4585), 249 states have return successors, (4585), 4477 states have call predecessors, (4585), 4585 states have call successors, (4585) [2022-11-16 12:39:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16735 states to 16735 states and 26513 transitions. [2022-11-16 12:39:10,453 INFO L78 Accepts]: Start accepts. Automaton has 16735 states and 26513 transitions. Word has length 111 [2022-11-16 12:39:10,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:10,454 INFO L495 AbstractCegarLoop]: Abstraction has 16735 states and 26513 transitions. [2022-11-16 12:39:10,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-11-16 12:39:10,454 INFO L276 IsEmpty]: Start isEmpty. Operand 16735 states and 26513 transitions. [2022-11-16 12:39:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 12:39:10,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:10,464 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:10,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (58)] Ended with exit code 0 [2022-11-16 12:39:10,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-16 12:39:10,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:39:10,865 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:39:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1804033275, now seen corresponding path program 2 times [2022-11-16 12:39:10,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:10,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182663651] [2022-11-16 12:39:10,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:39:10,866 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 [2022-11-16 12:39:10,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:10,867 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:39:10,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (61)] Waiting until timeout for monitored process [2022-11-16 12:39:11,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:39:11,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:11,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:39:11,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:11,267 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 [2022-11-16 12:39:11,376 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 [2022-11-16 12:39:11,460 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 [2022-11-16 12:39:11,540 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 [2022-11-16 12:39:11,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:11,655 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 26 treesize of output 25 [2022-11-16 12:39:11,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:11,738 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 [2022-11-16 12:39:11,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:11,807 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 [2022-11-16 12:39:11,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:11,883 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 [2022-11-16 12:39:11,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:11,960 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 [2022-11-16 12:39:12,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:12,083 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 [2022-11-16 12:39:12,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:12,160 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 [2022-11-16 12:39:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:12,240 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 [2022-11-16 12:39:12,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:12,322 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 [2022-11-16 12:39:12,411 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 [2022-11-16 12:39:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-11-16 12:39:12,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:12,876 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:12,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182663651] [2022-11-16 12:39:12,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182663651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:12,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1637922162] [2022-11-16 12:39:12,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:39:12,877 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:39:12,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:39:12,878 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:39:12,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-16 12:39:13,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:39:13,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:13,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:39:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:13,490 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 [2022-11-16 12:39:13,571 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 [2022-11-16 12:39:13,652 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 [2022-11-16 12:39:13,734 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 [2022-11-16 12:39:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:13,836 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 26 treesize of output 25 [2022-11-16 12:39:13,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:13,917 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 [2022-11-16 12:39:13,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:13,996 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 [2022-11-16 12:39:14,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:14,077 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 [2022-11-16 12:39:14,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:14,157 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 [2022-11-16 12:39:14,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:14,267 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 [2022-11-16 12:39:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:14,350 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 [2022-11-16 12:39:14,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:14,435 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 [2022-11-16 12:39:14,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:14,518 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 [2022-11-16 12:39:14,608 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 [2022-11-16 12:39:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-11-16 12:39:14,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:14,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1637922162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:14,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:14,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2022-11-16 12:39:14,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650232886] [2022-11-16 12:39:14,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:14,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:39:14,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:14,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:39:14,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:39:14,878 INFO L87 Difference]: Start difference. First operand 16735 states and 26513 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-16 12:39:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:21,798 INFO L93 Difference]: Finished difference Result 17751 states and 28010 transitions. [2022-11-16 12:39:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:39:21,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 111 [2022-11-16 12:39:21,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:21,827 INFO L225 Difference]: With dead ends: 17751 [2022-11-16 12:39:21,827 INFO L226 Difference]: Without dead ends: 17749 [2022-11-16 12:39:21,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 178 SyntacticMatches, 54 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:39:21,832 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 94 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:21,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 376 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 349 Invalid, 0 Unknown, 65 Unchecked, 0.8s Time] [2022-11-16 12:39:21,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17749 states. [2022-11-16 12:39:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17749 to 16797. [2022-11-16 12:39:27,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16797 states, 11944 states have (on average 1.4568821165438715) internal successors, (17401), 12050 states have internal predecessors, (17401), 4595 states have call successors, (4595), 257 states have call predecessors, (4595), 257 states have return successors, (4595), 4489 states have call predecessors, (4595), 4595 states have call successors, (4595) [2022-11-16 12:39:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16797 states to 16797 states and 26591 transitions. [2022-11-16 12:39:27,847 INFO L78 Accepts]: Start accepts. Automaton has 16797 states and 26591 transitions. Word has length 111 [2022-11-16 12:39:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:27,848 INFO L495 AbstractCegarLoop]: Abstraction has 16797 states and 26591 transitions. [2022-11-16 12:39:27,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-16 12:39:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 16797 states and 26591 transitions. [2022-11-16 12:39:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 12:39:27,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:27,858 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:27,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (61)] Ended with exit code 0 [2022-11-16 12:39:28,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-16 12:39:28,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:39:28,259 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:39:28,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:28,259 INFO L85 PathProgramCache]: Analyzing trace with hash 201521541, now seen corresponding path program 1 times [2022-11-16 12:39:28,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:28,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101298020] [2022-11-16 12:39:28,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:28,260 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 [2022-11-16 12:39:28,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:28,261 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:39:28,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (63)] Waiting until timeout for monitored process [2022-11-16 12:39:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:39:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:28,656 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 [2022-11-16 12:39:28,756 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 [2022-11-16 12:39:28,830 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 [2022-11-16 12:39:28,909 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 [2022-11-16 12:39:29,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:29,023 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 [2022-11-16 12:39:29,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:29,097 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 [2022-11-16 12:39:29,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:29,170 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 [2022-11-16 12:39:29,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:29,247 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 [2022-11-16 12:39:29,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:29,317 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 [2022-11-16 12:39:29,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:29,436 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 [2022-11-16 12:39:29,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:29,513 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 [2022-11-16 12:39:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:29,596 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 [2022-11-16 12:39:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:29,673 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 [2022-11-16 12:39:29,749 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 [2022-11-16 12:39:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-11-16 12:39:29,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:30,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:30,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101298020] [2022-11-16 12:39:30,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101298020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:30,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928060116] [2022-11-16 12:39:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:30,174 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:39:30,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:39:30,175 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:39:30,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-16 12:39:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:30,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:39:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:31,063 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 [2022-11-16 12:39:31,142 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 [2022-11-16 12:39:31,221 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 [2022-11-16 12:39:31,301 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 [2022-11-16 12:39:31,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:31,402 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 [2022-11-16 12:39:31,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:31,479 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 [2022-11-16 12:39:31,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:31,559 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 [2022-11-16 12:39:31,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:31,637 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 [2022-11-16 12:39:31,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:31,712 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 [2022-11-16 12:39:31,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:31,822 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 [2022-11-16 12:39:31,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:31,903 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 [2022-11-16 12:39:31,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:31,988 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 [2022-11-16 12:39:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:39:32,065 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 [2022-11-16 12:39:32,148 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 23 treesize of output 22 [2022-11-16 12:39:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-11-16 12:39:32,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:32,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [928060116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:32,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:32,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2022-11-16 12:39:32,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802452075] [2022-11-16 12:39:32,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:32,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:39:32,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:39:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:39:32,411 INFO L87 Difference]: Start difference. First operand 16797 states and 26591 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-16 12:39:39,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:39,974 INFO L93 Difference]: Finished difference Result 17798 states and 28056 transitions. [2022-11-16 12:39:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:39:39,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 111 [2022-11-16 12:39:39,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:40,012 INFO L225 Difference]: With dead ends: 17798 [2022-11-16 12:39:40,012 INFO L226 Difference]: Without dead ends: 17796 [2022-11-16 12:39:40,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 178 SyntacticMatches, 54 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:39:40,018 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 99 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:40,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 439 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 440 Invalid, 0 Unknown, 50 Unchecked, 0.9s Time] [2022-11-16 12:39:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17796 states. [2022-11-16 12:39:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17796 to 16665. [2022-11-16 12:39:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16665 states, 11812 states have (on average 1.456400270910938) internal successors, (17203), 11952 states have internal predecessors, (17203), 4595 states have call successors, (4595), 257 states have call predecessors, (4595), 257 states have return successors, (4595), 4455 states have call predecessors, (4595), 4595 states have call successors, (4595) [2022-11-16 12:39:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16665 states to 16665 states and 26393 transitions. [2022-11-16 12:39:46,171 INFO L78 Accepts]: Start accepts. Automaton has 16665 states and 26393 transitions. Word has length 111 [2022-11-16 12:39:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:46,171 INFO L495 AbstractCegarLoop]: Abstraction has 16665 states and 26393 transitions. [2022-11-16 12:39:46,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-16 12:39:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 16665 states and 26393 transitions. [2022-11-16 12:39:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-16 12:39:46,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:46,180 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:46,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-11-16 12:39:46,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (63)] Ended with exit code 0 [2022-11-16 12:39:46,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:39:46,581 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:39:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:46,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1563215797, now seen corresponding path program 9 times [2022-11-16 12:39:46,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:46,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245397876] [2022-11-16 12:39:46,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:39:46,582 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 [2022-11-16 12:39:46,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:46,583 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:39:46,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (65)] Waiting until timeout for monitored process [2022-11-16 12:39:47,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-16 12:39:47,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:39:47,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:47,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:39:47,274 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 [2022-11-16 12:39:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 12:39:47,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:48,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:48,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245397876] [2022-11-16 12:39:48,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245397876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:48,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954371420] [2022-11-16 12:39:48,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:39:48,678 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:39:48,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:39:48,679 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:39:48,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-16 12:39:49,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-16 12:39:49,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:49,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:39:49,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:50,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:39:50,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 12:39:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 27 proven. 147 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 12:39:51,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:52,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954371420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:52,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:52,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2022-11-16 12:39:52,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428968624] [2022-11-16 12:39:52,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:52,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:39:52,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:39:52,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1615, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:39:52,186 INFO L87 Difference]: Start difference. First operand 16665 states and 26393 transitions. Second operand has 31 states, 31 states have (on average 4.32258064516129) internal successors, (134), 31 states have internal predecessors, (134), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:40:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:17,912 INFO L93 Difference]: Finished difference Result 50491 states and 80556 transitions. [2022-11-16 12:40:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:40:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.32258064516129) internal successors, (134), 31 states have internal predecessors, (134), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 107 [2022-11-16 12:40:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:18,005 INFO L225 Difference]: With dead ends: 50491 [2022-11-16 12:40:18,005 INFO L226 Difference]: Without dead ends: 50489 [2022-11-16 12:40:18,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=463, Invalid=2729, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 12:40:18,013 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 595 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 3505 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 4119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 3505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:18,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 1839 Invalid, 4119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 3505 Invalid, 0 Unknown, 135 Unchecked, 6.3s Time] [2022-11-16 12:40:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50489 states. [2022-11-16 12:40:31,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50489 to 33335. [2022-11-16 12:40:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33335 states, 23754 states have (on average 1.4656057927085964) internal successors, (34814), 23866 states have internal predecessors, (34814), 9255 states have call successors, (9255), 325 states have call predecessors, (9255), 325 states have return successors, (9255), 9143 states have call predecessors, (9255), 9255 states have call successors, (9255) [2022-11-16 12:40:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33335 states to 33335 states and 53324 transitions. [2022-11-16 12:40:32,007 INFO L78 Accepts]: Start accepts. Automaton has 33335 states and 53324 transitions. Word has length 107 [2022-11-16 12:40:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:32,007 INFO L495 AbstractCegarLoop]: Abstraction has 33335 states and 53324 transitions. [2022-11-16 12:40:32,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.32258064516129) internal successors, (134), 31 states have internal predecessors, (134), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:40:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 33335 states and 53324 transitions. [2022-11-16 12:40:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-16 12:40:32,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:32,029 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:32,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:32,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (65)] Ended with exit code 0 [2022-11-16 12:40:32,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 [2022-11-16 12:40:32,430 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:40:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:32,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1838265161, now seen corresponding path program 2 times [2022-11-16 12:40:32,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:40:32,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699267488] [2022-11-16 12:40:32,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:40:32,431 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 [2022-11-16 12:40:32,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:40:32,432 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:40:32,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (67)] Waiting until timeout for monitored process [2022-11-16 12:40:32,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:40:32,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:32,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:40:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:33,225 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 [2022-11-16 12:40:33,325 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 [2022-11-16 12:40:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 27 proven. 147 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 12:40:33,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:34,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:40:34,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699267488] [2022-11-16 12:40:34,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699267488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:34,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1024285967] [2022-11-16 12:40:34,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:40:34,881 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:40:34,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:40:34,882 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:40:34,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-16 12:40:35,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:40:35,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:35,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:40:35,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:35,740 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 [2022-11-16 12:40:35,824 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 23 treesize of output 22 [2022-11-16 12:40:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 27 proven. 147 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 12:40:36,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:36,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1024285967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:36,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:40:36,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2022-11-16 12:40:36,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978455642] [2022-11-16 12:40:36,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:36,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:40:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:40:36,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:40:36,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:40:36,632 INFO L87 Difference]: Start difference. First operand 33335 states and 53324 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:40:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:54,923 INFO L93 Difference]: Finished difference Result 37533 states and 59396 transitions. [2022-11-16 12:40:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:40:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2022-11-16 12:40:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:54,995 INFO L225 Difference]: With dead ends: 37533 [2022-11-16 12:40:54,995 INFO L226 Difference]: Without dead ends: 37531 [2022-11-16 12:40:55,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 261 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:40:55,002 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 221 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:55,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1261 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1863 Invalid, 0 Unknown, 70 Unchecked, 2.8s Time] [2022-11-16 12:40:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37531 states. [2022-11-16 12:41:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37531 to 35723. [2022-11-16 12:41:09,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35723 states, 25474 states have (on average 1.4668289236083851) internal successors, (37366), 25586 states have internal predecessors, (37366), 9895 states have call successors, (9895), 353 states have call predecessors, (9895), 353 states have return successors, (9895), 9783 states have call predecessors, (9895), 9895 states have call successors, (9895) [2022-11-16 12:41:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35723 states to 35723 states and 57156 transitions. [2022-11-16 12:41:09,391 INFO L78 Accepts]: Start accepts. Automaton has 35723 states and 57156 transitions. Word has length 107 [2022-11-16 12:41:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:09,391 INFO L495 AbstractCegarLoop]: Abstraction has 35723 states and 57156 transitions. [2022-11-16 12:41:09,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:41:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 35723 states and 57156 transitions. [2022-11-16 12:41:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 12:41:09,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:09,416 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:09,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (67)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:09,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-11-16 12:41:09,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 12:41:09,831 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:41:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:09,831 INFO L85 PathProgramCache]: Analyzing trace with hash 994109945, now seen corresponding path program 3 times [2022-11-16 12:41:09,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:41:09,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263369191] [2022-11-16 12:41:09,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:41:09,832 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 [2022-11-16 12:41:09,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:41:09,833 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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) [2022-11-16 12:41:09,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/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 (69)] Waiting until timeout for monitored process [2022-11-16 12:41:10,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 12:41:10,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:10,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 12:41:10,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:10,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:41:10,475 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 30 treesize of output 29 [2022-11-16 12:41:10,545 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 30 treesize of output 29 [2022-11-16 12:41:10,668 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 30 treesize of output 29 [2022-11-16 12:41:10,746 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 30 treesize of output 29 [2022-11-16 12:41:10,822 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 30 treesize of output 29 [2022-11-16 12:41:10,895 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 30 treesize of output 29 [2022-11-16 12:41:10,974 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 30 treesize of output 29 [2022-11-16 12:41:11,114 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 30 treesize of output 29 [2022-11-16 12:41:11,191 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 30 treesize of output 29 [2022-11-16 12:41:11,273 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 30 treesize of output 29 [2022-11-16 12:41:11,353 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 30 treesize of output 29 [2022-11-16 12:41:11,436 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 [2022-11-16 12:41:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 108 proven. 62 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-16 12:41:11,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:11,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:41:11,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263369191] [2022-11-16 12:41:11,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263369191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:11,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1297480165] [2022-11-16 12:41:11,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:41:11,974 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 12:41:11,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 12:41:11,975 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 12:41:11,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-16 12:41:12,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:41:12,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836400102] [2022-11-16 12:41:12,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:41:12,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:12,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:12,533 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:12,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 1 [2022-11-16 12:41:12,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37199b-5f9e-416f-a267-31947f721d25/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-16 12:41:16,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 12:41:16,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:16,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 12:41:16,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:16,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 12:41:16,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-16 12:41:17,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:17,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-16 12:41:17,618 INFO L321 Elim1Store]: treesize reduction 48, result has 48.9 percent of original size [2022-11-16 12:41:17,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 70 [2022-11-16 12:41:18,327 INFO L321 Elim1Store]: treesize reduction 78, result has 37.1 percent of original size [2022-11-16 12:41:18,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 60 treesize of output 86 [2022-11-16 12:41:19,202 INFO L321 Elim1Store]: treesize reduction 108, result has 29.9 percent of original size [2022-11-16 12:41:19,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 73 treesize of output 102 [2022-11-16 12:41:20,231 INFO L321 Elim1Store]: treesize reduction 138, result has 25.0 percent of original size [2022-11-16 12:41:20,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 86 treesize of output 118 [2022-11-16 12:41:23,966 INFO L321 Elim1Store]: treesize reduction 168, result has 21.5 percent of original size [2022-11-16 12:41:23,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 134 [2022-11-16 12:42:16,683 WARN L233 SmtUtils]: Spent 49.41s on a formula simplification. DAG size of input: 144 DAG size of output: 132 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 12:42:16,685 INFO L321 Elim1Store]: treesize reduction 69, result has 85.2 percent of original size [2022-11-16 12:42:16,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 112 treesize of output 440