./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e --- 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-4e7fbc6 [2022-11-23 14:56:53,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:56:53,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:56:53,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:56:53,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:56:53,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:56:53,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:56:53,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:56:53,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:56:53,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:56:53,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:56:53,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:56:53,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:56:53,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:56:53,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:56:53,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:56:53,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:56:53,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:56:53,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:56:53,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:56:53,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:56:53,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:56:53,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:56:53,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:56:53,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:56:53,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:56:53,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:56:53,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:56:53,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:56:53,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:56:53,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:56:53,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:56:53,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:56:53,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:56:53,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:56:53,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:56:53,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:56:53,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:56:53,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:56:53,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:56:53,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:56:53,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:56:53,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:56:53,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:56:53,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:56:53,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:56:53,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:56:53,951 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:56:53,952 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:56:53,952 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:56:53,952 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:56:53,952 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:56:53,953 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:56:53,953 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:56:53,954 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:56:53,954 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:56:53,954 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:56:53,954 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:56:53,954 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:56:53,955 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:56:53,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:56:53,955 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:56:53,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:56:53,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:56:53,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:56:53,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:56:53,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:56:53,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:56:53,957 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:56:53,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:56:53,958 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:56:53,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:56:53,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:56:53,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:56:53,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:56:53,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:56:53,959 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:56:53,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:56:53,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:56:53,959 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:56:53,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:56:53,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:56:53,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:56:53,960 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_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e [2022-11-23 14:56:54,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:56:54,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:56:54,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:56:54,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:56:54,308 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:56:54,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2022-11-23 14:56:57,389 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:56:57,614 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:56:57,615 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2022-11-23 14:56:57,622 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/data/27aa7342d/805ab5c4c59a421aa0bd7203164c032b/FLAG8506afdca [2022-11-23 14:56:57,637 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/data/27aa7342d/805ab5c4c59a421aa0bd7203164c032b [2022-11-23 14:56:57,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:56:57,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:56:57,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:56:57,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:56:57,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:56:57,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4124857e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57, skipping insertion in model container [2022-11-23 14:56:57,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:56:57,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:56:57,864 WARN L237 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_81e2fe72-9274-4e04-933a-4e5c493948d5/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2022-11-23 14:56:57,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:56:57,896 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:56:57,907 WARN L237 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_81e2fe72-9274-4e04-933a-4e5c493948d5/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2022-11-23 14:56:57,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:56:57,934 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:56:57,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57 WrapperNode [2022-11-23 14:56:57,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:56:57,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:56:57,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:56:57,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:56:57,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,969 INFO L138 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 118 [2022-11-23 14:56:57,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:56:57,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:56:57,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:56:57,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:56:57,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,998 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:57,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:58,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:56:58,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:56:58,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:56:58,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:56:58,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (1/1) ... [2022-11-23 14:56:58,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:56:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:56:58,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:56:58,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:56:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:56:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:56:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:56:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:56:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:56:58,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:56:58,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:56:58,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:56:58,191 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:56:58,193 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:56:58,421 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:56:58,470 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:56:58,470 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-23 14:56:58,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:56:58 BoogieIcfgContainer [2022-11-23 14:56:58,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:56:58,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:56:58,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:56:58,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:56:58,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:56:57" (1/3) ... [2022-11-23 14:56:58,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ccf5dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:56:58, skipping insertion in model container [2022-11-23 14:56:58,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:57" (2/3) ... [2022-11-23 14:56:58,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ccf5dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:56:58, skipping insertion in model container [2022-11-23 14:56:58,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:56:58" (3/3) ... [2022-11-23 14:56:58,483 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2022-11-23 14:56:58,502 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:56:58,503 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:56:58,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:56:58,558 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=FINITE_AUTOMATA, 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;@290c1eeb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:56:58,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:56:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:56:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:56:58,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:56:58,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:56:58,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:56:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:56:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2125816706, now seen corresponding path program 1 times [2022-11-23 14:56:58,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:56:58,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320221210] [2022-11-23 14:56:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:56:58,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:56:58,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:56:58,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522496906] [2022-11-23 14:56:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:56:58,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:56:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:56:58,760 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:56:58,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:56:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:56:58,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:56:58,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:56:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:56:58,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:56:58,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:56:58,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320221210] [2022-11-23 14:56:58,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:56:58,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522496906] [2022-11-23 14:56:58,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522496906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:56:58,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:56:58,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:56:58,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017317141] [2022-11-23 14:56:58,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:56:58,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:56:58,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:56:59,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:56:59,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:56:59,040 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:56:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:56:59,108 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-11-23 14:56:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:56:59,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-23 14:56:59,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:56:59,120 INFO L225 Difference]: With dead ends: 29 [2022-11-23 14:56:59,120 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 14:56:59,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:56:59,127 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:56:59,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:56:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 14:56:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-11-23 14:56:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:56:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2022-11-23 14:56:59,163 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 8 [2022-11-23 14:56:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:56:59,163 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2022-11-23 14:56:59,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:56:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2022-11-23 14:56:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:56:59,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:56:59,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:56:59,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:56:59,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:56:59,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:56:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:56:59,372 INFO L85 PathProgramCache]: Analyzing trace with hash -952978249, now seen corresponding path program 1 times [2022-11-23 14:56:59,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:56:59,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066674415] [2022-11-23 14:56:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:56:59,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:56:59,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:56:59,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900651188] [2022-11-23 14:56:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:56:59,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:56:59,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:56:59,398 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:56:59,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:56:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:56:59,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:56:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:56:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:56:59,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:56:59,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:56:59,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066674415] [2022-11-23 14:56:59,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:56:59,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900651188] [2022-11-23 14:56:59,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900651188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:56:59,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:56:59,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:56:59,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48868070] [2022-11-23 14:56:59,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:56:59,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:56:59,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:56:59,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:56:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:56:59,513 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:56:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:56:59,622 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2022-11-23 14:56:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:56:59,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:56:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:56:59,624 INFO L225 Difference]: With dead ends: 40 [2022-11-23 14:56:59,625 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 14:56:59,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:56:59,627 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:56:59,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:56:59,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 14:56:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2022-11-23 14:56:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:56:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2022-11-23 14:56:59,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 10 [2022-11-23 14:56:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:56:59,640 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2022-11-23 14:56:59,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:56:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2022-11-23 14:56:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:56:59,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:56:59,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:56:59,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:56:59,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 14:56:59,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:56:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:56:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash 821330551, now seen corresponding path program 1 times [2022-11-23 14:56:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:56:59,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149649247] [2022-11-23 14:56:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:56:59,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:56:59,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:56:59,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808580058] [2022-11-23 14:56:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:56:59,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:56:59,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:56:59,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:56:59,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:56:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:00,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:57:00,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:00,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:57:00,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149649247] [2022-11-23 14:57:00,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:57:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808580058] [2022-11-23 14:57:00,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808580058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:57:00,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:57:00,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:57:00,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592722935] [2022-11-23 14:57:00,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:57:00,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:57:00,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:00,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:57:00,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:57:00,042 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:00,137 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-11-23 14:57:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:57:00,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 14:57:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:00,138 INFO L225 Difference]: With dead ends: 43 [2022-11-23 14:57:00,139 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 14:57:00,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:57:00,140 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:00,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:57:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 14:57:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-11-23 14:57:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-11-23 14:57:00,149 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 12 [2022-11-23 14:57:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:00,149 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-11-23 14:57:00,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-11-23 14:57:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:57:00,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:00,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:00,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:00,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:00,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:00,363 INFO L85 PathProgramCache]: Analyzing trace with hash 66772088, now seen corresponding path program 1 times [2022-11-23 14:57:00,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:00,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486445215] [2022-11-23 14:57:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:00,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:00,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:57:00,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063855136] [2022-11-23 14:57:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:00,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:00,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:57:00,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:57:00,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:57:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:57:00,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:00,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:00,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:00,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486445215] [2022-11-23 14:57:00,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:57:00,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063855136] [2022-11-23 14:57:00,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063855136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:00,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [803158326] [2022-11-23 14:57:00,656 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:57:00,656 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:57:00,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:57:00,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:57:00,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:57:00,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:00,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:00,924 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 14:57:00,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 14:57:00,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:00,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-11-23 14:57:01,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:01,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:01,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2022-11-23 14:57:01,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:01,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:01,514 INFO L321 Elim1Store]: treesize reduction 162, result has 16.5 percent of original size [2022-11-23 14:57:01,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 480 treesize of output 448 [2022-11-23 14:57:01,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:01,735 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:01,735 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:01,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:01,958 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:01,959 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:02,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:02,030 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:02,033 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:02,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:02,181 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:02,181 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:02,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:02,273 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:02,274 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:02,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:02,331 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:02,331 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:02,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:02,510 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-23 14:57:02,511 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 1 case distinctions, treesize of input 66 treesize of output 45 [2022-11-23 14:57:02,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:02,591 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:02,591 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:02,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:02,786 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-23 14:57:02,787 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 1 case distinctions, treesize of input 66 treesize of output 45 [2022-11-23 14:57:02,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:02,861 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:02,862 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:02,872 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:57:03,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [803158326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:57:03,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:57:03,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-23 14:57:03,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741933207] [2022-11-23 14:57:03,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:57:03,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:57:03,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:03,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:57:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:57:03,203 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:03,341 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-11-23 14:57:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:57:03,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 14:57:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:03,342 INFO L225 Difference]: With dead ends: 42 [2022-11-23 14:57:03,342 INFO L226 Difference]: Without dead ends: 33 [2022-11-23 14:57:03,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:57:03,343 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:03,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:57:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-23 14:57:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2022-11-23 14:57:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-11-23 14:57:03,358 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-11-23 14:57:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:03,358 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-11-23 14:57:03,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-11-23 14:57:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:57:03,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:03,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:03,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:03,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:03,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:03,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1959799413, now seen corresponding path program 1 times [2022-11-23 14:57:03,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:03,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944306467] [2022-11-23 14:57:03,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:03,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:03,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:57:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653868948] [2022-11-23 14:57:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:03,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:03,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:57:03,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:57:03,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:57:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:03,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:57:03,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:57:03,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:57:03,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:03,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944306467] [2022-11-23 14:57:03,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:57:03,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653868948] [2022-11-23 14:57:03,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653868948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:03,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [63712998] [2022-11-23 14:57:03,719 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 14:57:03,720 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:57:03,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:57:03,720 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:57:03,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:57:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:03,849 INFO L321 Elim1Store]: treesize reduction 185, result has 22.9 percent of original size [2022-11-23 14:57:03,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 81 [2022-11-23 14:57:03,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:03,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:03,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:04,029 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 14:57:04,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 14:57:04,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:04,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:04,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2022-11-23 14:57:04,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:04,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:04,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:04,321 INFO L321 Elim1Store]: treesize reduction 162, result has 16.5 percent of original size [2022-11-23 14:57:04,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 480 treesize of output 448 [2022-11-23 14:57:04,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:04,482 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:04,483 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:04,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:04,651 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:04,651 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:04,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:04,708 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:04,708 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:04,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:04,865 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-23 14:57:04,866 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 1 case distinctions, treesize of input 66 treesize of output 45 [2022-11-23 14:57:04,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:04,935 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:04,935 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:05,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:05,075 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-23 14:57:05,075 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 1 case distinctions, treesize of input 66 treesize of output 45 [2022-11-23 14:57:05,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:05,137 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:05,137 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:05,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:05,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:05,307 INFO L321 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2022-11-23 14:57:05,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2022-11-23 14:57:05,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:05,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:05,567 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 14:57:05,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 14:57:05,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:05,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:05,827 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 14:57:05,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 14:57:06,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:06,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:06,061 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 14:57:06,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 14:57:06,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:06,356 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:06,357 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:06,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:06,404 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:06,405 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:06,411 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:57:07,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '708#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4))))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)))))) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4))))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-23 14:57:07,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:57:07,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:57:07,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-23 14:57:07,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786574124] [2022-11-23 14:57:07,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:57:07,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:57:07,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:57:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:57:07,144 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:07,293 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2022-11-23 14:57:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:57:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 14:57:07,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:07,294 INFO L225 Difference]: With dead ends: 64 [2022-11-23 14:57:07,294 INFO L226 Difference]: Without dead ends: 44 [2022-11-23 14:57:07,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:57:07,295 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:07,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 18 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:57:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-23 14:57:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-11-23 14:57:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-11-23 14:57:07,311 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2022-11-23 14:57:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:07,311 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-11-23 14:57:07,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-11-23 14:57:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 14:57:07,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:07,312 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:07,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:07,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:07,519 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:07,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1426358148, now seen corresponding path program 2 times [2022-11-23 14:57:07,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:07,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743494312] [2022-11-23 14:57:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:07,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:07,542 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:57:07,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556556393] [2022-11-23 14:57:07,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:57:07,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:57:07,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:57:07,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:57:07,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:57:07,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:57:07,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:57:07,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 14:57:07,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 14:57:07,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:07,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743494312] [2022-11-23 14:57:07,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:57:07,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556556393] [2022-11-23 14:57:07,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556556393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:07,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374375705] [2022-11-23 14:57:07,736 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 14:57:07,736 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:57:07,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:57:07,737 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:57:07,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:57:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:07,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:07,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:07,905 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 14:57:07,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 14:57:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:07,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:07,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-11-23 14:57:08,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:08,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:08,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2022-11-23 14:57:08,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:08,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:08,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:08,211 INFO L321 Elim1Store]: treesize reduction 162, result has 16.5 percent of original size [2022-11-23 14:57:08,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 480 treesize of output 448 [2022-11-23 14:57:08,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:08,343 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:08,343 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:08,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:08,476 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-23 14:57:08,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2022-11-23 14:57:08,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:08,538 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:08,539 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:08,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:08,601 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:08,602 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:08,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:08,700 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:08,700 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:08,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:08,768 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:08,768 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:08,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:08,806 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:08,807 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:08,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:08,920 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-23 14:57:08,921 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 1 case distinctions, treesize of input 66 treesize of output 45 [2022-11-23 14:57:08,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:08,972 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:08,973 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:09,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:09,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:09,157 INFO L321 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2022-11-23 14:57:09,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2022-11-23 14:57:09,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:09,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:09,354 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 14:57:09,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 14:57:09,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:09,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:09,617 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 14:57:09,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 14:57:09,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:09,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:09,877 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 14:57:09,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 14:57:10,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:10,187 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-23 14:57:10,188 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 1 case distinctions, treesize of input 66 treesize of output 45 [2022-11-23 14:57:10,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:10,249 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 14:57:10,249 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 14:57:10,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:57:11,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1042#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4))))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)))))) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4))))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-23 14:57:11,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:57:11,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:57:11,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-23 14:57:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567813754] [2022-11-23 14:57:11,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:57:11,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:57:11,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:11,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:57:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:57:11,121 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:11,300 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2022-11-23 14:57:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:57:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 14:57:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:11,302 INFO L225 Difference]: With dead ends: 167 [2022-11-23 14:57:11,303 INFO L226 Difference]: Without dead ends: 140 [2022-11-23 14:57:11,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 13 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:57:11,304 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 121 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:11,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 28 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:57:11,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-23 14:57:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 85. [2022-11-23 14:57:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 84 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2022-11-23 14:57:11,345 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 24 [2022-11-23 14:57:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:11,345 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2022-11-23 14:57:11,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2022-11-23 14:57:11,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 14:57:11,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:11,347 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:11,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:11,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:57:11,563 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:11,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:11,563 INFO L85 PathProgramCache]: Analyzing trace with hash -618004630, now seen corresponding path program 3 times [2022-11-23 14:57:11,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:11,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665692212] [2022-11-23 14:57:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:11,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:11,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:57:11,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63824459] [2022-11-23 14:57:11,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:57:11,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:11,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:57:11,596 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:57:11,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:08:59,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:08:59,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:08:59,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:08:59,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 151 proven. 1 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-11-23 15:08:59,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:08:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 122 proven. 30 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-11-23 15:08:59,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665692212] [2022-11-23 15:08:59,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:08:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63824459] [2022-11-23 15:08:59,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63824459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:08:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1081091455] [2022-11-23 15:08:59,911 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:08:59,911 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:08:59,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:08:59,911 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:08:59,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:08:59,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:59,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:59,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:00,059 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 15:09:00,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 15:09:00,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:00,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:00,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:00,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-11-23 15:09:00,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:00,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:00,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2022-11-23 15:09:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:00,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:00,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:00,369 INFO L321 Elim1Store]: treesize reduction 162, result has 16.5 percent of original size [2022-11-23 15:09:00,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 480 treesize of output 448 [2022-11-23 15:09:00,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:00,497 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:00,497 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:00,615 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-23 15:09:00,616 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 1 case distinctions, treesize of input 66 treesize of output 45 [2022-11-23 15:09:00,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:00,688 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:00,689 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:00,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:00,728 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:00,728 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:00,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:00,866 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-23 15:09:00,866 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 1 case distinctions, treesize of input 66 treesize of output 45 [2022-11-23 15:09:00,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:00,922 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:00,923 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:01,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:01,031 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:01,031 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:01,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:01,068 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:01,068 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:01,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:01,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:01,220 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 15:09:01,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 15:09:01,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:01,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:01,423 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 15:09:01,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 15:09:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:01,653 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 15:09:01,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 15:09:01,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:01,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:01,839 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 15:09:01,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 15:09:02,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:02,106 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:02,106 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:02,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:02,143 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:02,144 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:02,147 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:09:03,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1951#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4))))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)))))) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4))))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-23 15:09:03,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:09:03,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:09:03,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-23 15:09:03,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682671860] [2022-11-23 15:09:03,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:09:03,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:09:03,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:03,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:09:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:09:03,303 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:09:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:03,541 INFO L93 Difference]: Finished difference Result 354 states and 461 transitions. [2022-11-23 15:09:03,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:09:03,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-23 15:09:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:03,543 INFO L225 Difference]: With dead ends: 354 [2022-11-23 15:09:03,543 INFO L226 Difference]: Without dead ends: 278 [2022-11-23 15:09:03,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 160 SyntacticMatches, 43 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:09:03,545 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 134 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:03,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 19 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:09:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-23 15:09:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2022-11-23 15:09:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.2333333333333334) internal successors, (333), 270 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:09:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 333 transitions. [2022-11-23 15:09:03,638 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 333 transitions. Word has length 72 [2022-11-23 15:09:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:03,638 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 333 transitions. [2022-11-23 15:09:03,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:09:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 333 transitions. [2022-11-23 15:09:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-23 15:09:03,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:03,643 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:03,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:09:03,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:09:03,843 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash -655371538, now seen corresponding path program 4 times [2022-11-23 15:09:03,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:03,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883016246] [2022-11-23 15:09:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:03,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:03,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:09:03,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554698358] [2022-11-23 15:09:03,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:09:03,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:03,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:09:03,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:09:03,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:09:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:04,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:09:04,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:09:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6720 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 6312 trivial. 0 not checked. [2022-11-23 15:09:04,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:09:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6720 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 6312 trivial. 0 not checked. [2022-11-23 15:09:04,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:04,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883016246] [2022-11-23 15:09:04,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:09:04,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554698358] [2022-11-23 15:09:04,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554698358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:09:04,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589377245] [2022-11-23 15:09:04,649 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:09:04,649 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:09:04,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:09:04,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:09:04,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:09:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:04,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:04,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:04,808 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 15:09:04,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 15:09:04,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:04,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-11-23 15:09:04,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:04,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:04,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2022-11-23 15:09:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:05,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:09:05,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,053 INFO L321 Elim1Store]: treesize reduction 162, result has 16.5 percent of original size [2022-11-23 15:09:05,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 480 treesize of output 448 [2022-11-23 15:09:05,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,173 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:05,174 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:05,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,314 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:05,315 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:05,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,402 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:05,403 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:05,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,505 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:05,506 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:05,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,568 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:05,569 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:05,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,612 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:05,613 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:05,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,692 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:05,693 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:05,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,741 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:05,742 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:05,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:05,881 INFO L321 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2022-11-23 15:09:05,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2022-11-23 15:09:06,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:06,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:06,138 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 15:09:06,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 15:09:06,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:06,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:06,355 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 15:09:06,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 15:09:06,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:06,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:06,534 INFO L321 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2022-11-23 15:09:06,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-23 15:09:06,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:06,809 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:06,809 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:06,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:09:06,856 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:09:06,856 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 1 case distinctions, treesize of input 78 treesize of output 53 [2022-11-23 15:09:06,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:09:09,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4464#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4))))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)))))) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4))))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-23 15:09:09,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:09:09,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:09:09,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-23 15:09:09,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972820211] [2022-11-23 15:09:09,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:09:09,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 15:09:09,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:09,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 15:09:09,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:09:09,668 INFO L87 Difference]: Start difference. First operand 271 states and 333 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:09:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:10,098 INFO L93 Difference]: Finished difference Result 817 states and 1171 transitions. [2022-11-23 15:09:10,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:09:10,099 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2022-11-23 15:09:10,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:10,102 INFO L225 Difference]: With dead ends: 817 [2022-11-23 15:09:10,102 INFO L226 Difference]: Without dead ends: 554 [2022-11-23 15:09:10,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 502 SyntacticMatches, 127 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=226, Invalid=326, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:09:10,110 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 139 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:10,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 36 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:09:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-23 15:09:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 535. [2022-11-23 15:09:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.1629213483146068) internal successors, (621), 534 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:09:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 621 transitions. [2022-11-23 15:09:10,286 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 621 transitions. Word has length 216 [2022-11-23 15:09:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:10,287 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 621 transitions. [2022-11-23 15:09:10,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:09:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 621 transitions. [2022-11-23 15:09:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-11-23 15:09:10,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:10,297 INFO L195 NwaCegarLoop]: trace histogram [160, 160, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:10,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:09:10,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:09:10,512 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:10,513 INFO L85 PathProgramCache]: Analyzing trace with hash 792008942, now seen corresponding path program 5 times [2022-11-23 15:09:10,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:10,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601423943] [2022-11-23 15:09:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:10,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:10,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:09:10,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073910580] [2022-11-23 15:09:10,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:09:10,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:10,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:09:10,711 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:09:10,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e2fe72-9274-4e04-933a-4e5c493948d5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process