./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba --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 7202e877c1332442c2c226005d8bd7e5f4094e339ca214931497ee0f3766da6a --- 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-b5237d8 [2022-11-22 01:33:16,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:33:16,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:33:16,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:33:16,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:33:16,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:33:16,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:33:16,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:33:16,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:33:16,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:33:16,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:33:16,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:33:16,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:33:16,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:33:16,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:33:16,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:33:16,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:33:16,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:33:16,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:33:16,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:33:16,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:33:16,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:33:16,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:33:16,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:33:16,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:33:16,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:33:16,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:33:16,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:33:16,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:33:16,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:33:16,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:33:16,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:33:16,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:33:16,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:33:16,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:33:16,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:33:16,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:33:16,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:33:16,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:33:16,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:33:16,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:33:16,659 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:33:16,701 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:33:16,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:33:16,702 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:33:16,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:33:16,703 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:33:16,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:33:16,703 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:33:16,704 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:33:16,704 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:33:16,704 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:33:16,705 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:33:16,706 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:33:16,706 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:33:16,706 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:33:16,706 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:33:16,707 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:33:16,707 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:33:16,707 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:33:16,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:33:16,709 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:33:16,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:33:16,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:33:16,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:33:16,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:33:16,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:33:16,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:33:16,711 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:33:16,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:33:16,712 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:33:16,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:33:16,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:33:16,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:33:16,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:33:16,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:33:16,713 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:33:16,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:33:16,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:33:16,714 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:33:16,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:33:16,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:33:16,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:33:16,715 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_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7202e877c1332442c2c226005d8bd7e5f4094e339ca214931497ee0f3766da6a [2022-11-22 01:33:16,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:33:17,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:33:17,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:33:17,016 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:33:17,017 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:33:17,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2022-11-22 01:33:20,091 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:33:20,321 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:33:20,322 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2022-11-22 01:33:20,328 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/data/e58c6f94d/648dd703d534419aa86d3ae80c4bb047/FLAG864fdfc3e [2022-11-22 01:33:20,343 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/data/e58c6f94d/648dd703d534419aa86d3ae80c4bb047 [2022-11-22 01:33:20,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:33:20,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:33:20,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:33:20,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:33:20,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:33:20,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1e1e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20, skipping insertion in model container [2022-11-22 01:33:20,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:33:20,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:33:20,515 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_bc6eb2e2-6100-4831-b314-d9ba22e30126/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2022-11-22 01:33:20,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:33:20,540 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:33:20,551 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_bc6eb2e2-6100-4831-b314-d9ba22e30126/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2022-11-22 01:33:20,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:33:20,574 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:33:20,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20 WrapperNode [2022-11-22 01:33:20,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:33:20,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:33:20,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:33:20,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:33:20,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,606 INFO L138 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-11-22 01:33:20,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:33:20,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:33:20,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:33:20,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:33:20,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:33:20,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:33:20,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:33:20,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:33:20,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (1/1) ... [2022-11-22 01:33:20,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:33:20,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:20,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:33:20,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:33:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:33:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:33:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:33:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:33:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:33:20,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:33:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:33:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:33:20,816 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:33:20,819 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:33:21,011 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:33:21,068 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:33:21,069 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-22 01:33:21,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:33:21 BoogieIcfgContainer [2022-11-22 01:33:21,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:33:21,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:33:21,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:33:21,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:33:21,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:33:20" (1/3) ... [2022-11-22 01:33:21,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e220a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:33:21, skipping insertion in model container [2022-11-22 01:33:21,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:33:20" (2/3) ... [2022-11-22 01:33:21,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e220a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:33:21, skipping insertion in model container [2022-11-22 01:33:21,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:33:21" (3/3) ... [2022-11-22 01:33:21,086 INFO L112 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2022-11-22 01:33:21,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:33:21,108 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:33:21,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:33:21,160 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;@657594f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:33:21,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:33:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:33:21,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:21,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:21,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:33:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:21,176 INFO L85 PathProgramCache]: Analyzing trace with hash -199734736, now seen corresponding path program 1 times [2022-11-22 01:33:21,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:21,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096797727] [2022-11-22 01:33:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:21,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:21,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:33:21,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164977988] [2022-11-22 01:33:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:21,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:21,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:21,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:33:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:21,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:33:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:21,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:33:21,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:21,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096797727] [2022-11-22 01:33:21,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:33:21,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164977988] [2022-11-22 01:33:21,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164977988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:33:21,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:33:21,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:33:21,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064531176] [2022-11-22 01:33:21,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:33:21,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:33:21,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:33:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:33:21,573 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:21,629 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-22 01:33:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:33:21,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:33:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:21,641 INFO L225 Difference]: With dead ends: 23 [2022-11-22 01:33:21,641 INFO L226 Difference]: Without dead ends: 13 [2022-11-22 01:33:21,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:33:21,648 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:21,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:33:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-22 01:33:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-22 01:33:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-22 01:33:21,686 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2022-11-22 01:33:21,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:21,687 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-22 01:33:21,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:21,687 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-22 01:33:21,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:33:21,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:21,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:21,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:21,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 01:33:21,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:33:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash -692344784, now seen corresponding path program 1 times [2022-11-22 01:33:21,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:21,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958172391] [2022-11-22 01:33:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:21,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:21,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:33:21,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530132348] [2022-11-22 01:33:21,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:21,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:21,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:21,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:33:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:33:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:22,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:33:22,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:22,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958172391] [2022-11-22 01:33:22,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:33:22,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530132348] [2022-11-22 01:33:22,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530132348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:33:22,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:33:22,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:33:22,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633726396] [2022-11-22 01:33:22,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:33:22,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:33:22,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:33:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:33:22,087 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:22,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:22,164 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-22 01:33:22,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:33:22,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:33:22,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:22,168 INFO L225 Difference]: With dead ends: 31 [2022-11-22 01:33:22,168 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 01:33:22,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:33:22,172 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:22,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 9 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:33:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 01:33:22,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-11-22 01:33:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:22,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-22 01:33:22,195 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2022-11-22 01:33:22,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:22,195 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-22 01:33:22,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-22 01:33:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:33:22,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:22,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:22,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:22,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:22,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:33:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:22,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2131955188, now seen corresponding path program 1 times [2022-11-22 01:33:22,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:22,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754100329] [2022-11-22 01:33:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:22,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:22,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:33:22,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310940993] [2022-11-22 01:33:22,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:22,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:22,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:22,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:22,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:33:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:22,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:33:22,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:22,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:22,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:22,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754100329] [2022-11-22 01:33:22,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:33:22,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310940993] [2022-11-22 01:33:22,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310940993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:22,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203176556] [2022-11-22 01:33:22,693 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:33:22,694 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:33:22,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:33:22,710 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:33:22,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:33:22,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:22,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:22,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:22,967 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-22 01:33:22,969 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 46 treesize of output 78 [2022-11-22 01:33:23,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:23,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:23,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:23,238 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 01:33:23,239 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 [2022-11-22 01:33:23,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:23,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:23,436 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 72 treesize of output 55 [2022-11-22 01:33:24,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:24,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:24,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:24,096 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-22 01:33:24,097 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 435 treesize of output 410 [2022-11-22 01:33:24,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:24,330 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:24,330 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 57 treesize of output 39 [2022-11-22 01:33:24,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:24,402 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:24,402 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 57 treesize of output 39 [2022-11-22 01:33:24,619 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:33:25,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [203176556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:33:25,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:33:25,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-22 01:33:25,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449970730] [2022-11-22 01:33:25,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:33:25,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:33:25,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:25,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:33:25,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:33:25,183 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:25,645 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-22 01:33:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:33:25,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:33:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:25,646 INFO L225 Difference]: With dead ends: 31 [2022-11-22 01:33:25,646 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 01:33:25,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:33:25,648 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:25,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:33:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 01:33:25,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2022-11-22 01:33:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-22 01:33:25,664 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-11-22 01:33:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:25,665 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-22 01:33:25,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-22 01:33:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:33:25,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:25,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:25,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 01:33:25,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-22 01:33:25,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:33:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1240462748, now seen corresponding path program 1 times [2022-11-22 01:33:25,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:25,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863905562] [2022-11-22 01:33:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:25,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:25,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:33:25,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580109562] [2022-11-22 01:33:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:25,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:25,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:25,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:25,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:33:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:33:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:33:25,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:33:26,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:26,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863905562] [2022-11-22 01:33:26,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:33:26,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580109562] [2022-11-22 01:33:26,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580109562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355443734] [2022-11-22 01:33:26,021 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:33:26,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:33:26,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:33:26,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:33:26,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:33:26,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,179 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 01:33:26,180 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 [2022-11-22 01:33:26,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,207 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 46 treesize of output 58 [2022-11-22 01:33:26,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,300 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 60 treesize of output 47 [2022-11-22 01:33:26,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,640 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-22 01:33:26,640 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 435 treesize of output 410 [2022-11-22 01:33:26,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,796 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:26,796 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 57 treesize of output 39 [2022-11-22 01:33:26,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,848 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:26,849 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 57 treesize of output 39 [2022-11-22 01:33:27,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,048 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-22 01:33:27,049 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 39 treesize of output 58 [2022-11-22 01:33:27,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,168 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:27,168 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 51 treesize of output 70 [2022-11-22 01:33:27,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,299 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:27,300 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 51 treesize of output 70 [2022-11-22 01:33:27,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,415 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:27,415 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 51 treesize of output 70 [2022-11-22 01:33:27,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,581 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:27,581 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 51 treesize of output 70 [2022-11-22 01:33:27,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,676 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:27,677 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 51 treesize of output 70 [2022-11-22 01:33:27,704 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:33:28,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '426#(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_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 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 [2022-11-22 01:33:28,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:33:28,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:33:28,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-22 01:33:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114490907] [2022-11-22 01:33:28,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:33:28,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:33:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:33:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:33:28,628 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:28,750 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-11-22 01:33:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:33:28,750 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2022-11-22 01:33:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:28,751 INFO L225 Difference]: With dead ends: 52 [2022-11-22 01:33:28,751 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 01:33:28,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:33:28,753 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:28,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 15 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:33:28,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 01:33:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-22 01:33:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 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) [2022-11-22 01:33:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-22 01:33:28,770 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2022-11-22 01:33:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:28,770 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-22 01:33:28,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-22 01:33:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:33:28,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:28,771 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:28,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:28,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:28,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:33:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:28,983 INFO L85 PathProgramCache]: Analyzing trace with hash -841573940, now seen corresponding path program 2 times [2022-11-22 01:33:28,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:28,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916935790] [2022-11-22 01:33:28,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:28,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:29,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:33:29,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288238581] [2022-11-22 01:33:29,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:33:29,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:29,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:29,004 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:29,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:33:29,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:33:29,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:33:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:33:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:33:29,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:33:29,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:29,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916935790] [2022-11-22 01:33:29,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:33:29,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288238581] [2022-11-22 01:33:29,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288238581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549145294] [2022-11-22 01:33:29,166 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:33:29,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:33:29,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:33:29,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:33:29,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:33:29,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,339 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 01:33:29,340 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 [2022-11-22 01:33:29,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,365 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 46 treesize of output 58 [2022-11-22 01:33:29,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,441 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 72 treesize of output 55 [2022-11-22 01:33:29,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:29,751 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-22 01:33:29,751 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 435 treesize of output 410 [2022-11-22 01:33:29,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:29,893 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:29,893 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 57 treesize of output 39 [2022-11-22 01:33:29,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:29,941 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:29,941 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 57 treesize of output 39 [2022-11-22 01:33:30,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,143 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:30,143 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 51 treesize of output 70 [2022-11-22 01:33:30,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,229 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:30,230 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 51 treesize of output 70 [2022-11-22 01:33:30,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,354 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:30,355 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 51 treesize of output 70 [2022-11-22 01:33:30,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,452 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:30,452 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 51 treesize of output 70 [2022-11-22 01:33:30,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,605 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-22 01:33:30,606 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 39 treesize of output 58 [2022-11-22 01:33:30,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:30,717 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:30,721 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 51 treesize of output 70 [2022-11-22 01:33:30,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:33:31,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '693#(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_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 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 [2022-11-22 01:33:31,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:33:31,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:33:31,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-22 01:33:31,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617555114] [2022-11-22 01:33:31,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:33:31,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:33:31,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:31,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:33:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:33:31,640 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:31,718 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-11-22 01:33:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:33:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 19 [2022-11-22 01:33:31,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:31,720 INFO L225 Difference]: With dead ends: 72 [2022-11-22 01:33:31,720 INFO L226 Difference]: Without dead ends: 49 [2022-11-22 01:33:31,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:33:31,722 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:31,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:33:31,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-22 01:33:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-22 01:33:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-11-22 01:33:31,746 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2022-11-22 01:33:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:31,747 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-11-22 01:33:31,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-11-22 01:33:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:33:31,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:31,748 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:31,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:31,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:31,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:33:31,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1454414132, now seen corresponding path program 3 times [2022-11-22 01:33:31,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:31,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251282895] [2022-11-22 01:33:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:31,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:31,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:33:31,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613890358] [2022-11-22 01:33:31,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:33:31,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:31,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:31,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:33:44,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:33:44,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:33:44,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:33:44,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 01:33:44,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 01:33:44,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:44,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251282895] [2022-11-22 01:33:44,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:33:44,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613890358] [2022-11-22 01:33:44,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613890358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:44,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [813998007] [2022-11-22 01:33:44,570 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:33:44,570 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:33:44,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:33:44,570 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:33:44,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:33:44,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:44,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:44,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:44,689 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-22 01:33:44,690 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 46 treesize of output 78 [2022-11-22 01:33:44,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:44,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:44,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:44,845 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 01:33:44,845 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 [2022-11-22 01:33:44,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:44,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:44,935 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 72 treesize of output 55 [2022-11-22 01:33:45,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:45,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,263 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-22 01:33:45,263 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 435 treesize of output 410 [2022-11-22 01:33:45,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,402 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:45,402 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 57 treesize of output 39 [2022-11-22 01:33:45,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,448 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:45,448 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 57 treesize of output 39 [2022-11-22 01:33:45,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,630 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:45,634 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 51 treesize of output 70 [2022-11-22 01:33:45,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,729 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:45,730 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 51 treesize of output 70 [2022-11-22 01:33:45,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,834 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:45,835 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 51 treesize of output 70 [2022-11-22 01:33:45,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:45,949 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:45,949 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 51 treesize of output 70 [2022-11-22 01:33:46,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:46,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:46,124 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:46,125 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 51 treesize of output 70 [2022-11-22 01:33:46,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:46,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:46,221 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:46,223 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 51 treesize of output 70 [2022-11-22 01:33:46,250 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:33:47,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1151#(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_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 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 [2022-11-22 01:33:47,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:33:47,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:33:47,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-22 01:33:47,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142408764] [2022-11-22 01:33:47,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:33:47,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:33:47,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:47,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:33:47,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:33:47,198 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-11-22 01:33:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:47,502 INFO L93 Difference]: Finished difference Result 158 states and 212 transitions. [2022-11-22 01:33:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:33:47,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) Word has length 37 [2022-11-22 01:33:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:47,504 INFO L225 Difference]: With dead ends: 158 [2022-11-22 01:33:47,504 INFO L226 Difference]: Without dead ends: 116 [2022-11-22 01:33:47,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:33:47,505 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:47,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 33 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:33:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-22 01:33:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2022-11-22 01:33:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1875) internal successors, (114), 96 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-11-22 01:33:47,547 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 37 [2022-11-22 01:33:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:47,548 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-11-22 01:33:47,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-11-22 01:33:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-11-22 01:33:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 01:33:47,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:47,552 INFO L195 NwaCegarLoop]: trace histogram [40, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:47,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:47,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:47,754 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:33:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:47,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2081508276, now seen corresponding path program 4 times [2022-11-22 01:33:47,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:47,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517703205] [2022-11-22 01:33:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:47,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:47,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:33:47,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106792028] [2022-11-22 01:33:47,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:33:47,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:47,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:47,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:47,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:33:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:48,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:33:48,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-22 01:33:48,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-22 01:33:48,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:48,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517703205] [2022-11-22 01:33:48,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:33:48,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106792028] [2022-11-22 01:33:48,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106792028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:48,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859518382] [2022-11-22 01:33:48,448 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:33:48,448 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:33:48,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:33:48,448 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:33:48,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:33:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:48,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:48,585 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-22 01:33:48,585 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 46 treesize of output 78 [2022-11-22 01:33:48,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:48,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:48,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:48,745 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 01:33:48,745 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 [2022-11-22 01:33:48,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:48,830 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 60 treesize of output 47 [2022-11-22 01:33:49,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:49,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:49,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,092 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-22 01:33:49,093 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 435 treesize of output 410 [2022-11-22 01:33:49,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,214 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:49,215 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 57 treesize of output 39 [2022-11-22 01:33:49,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,267 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:49,268 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 57 treesize of output 39 [2022-11-22 01:33:49,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,457 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-22 01:33:49,458 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 39 treesize of output 58 [2022-11-22 01:33:49,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,553 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:49,554 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 51 treesize of output 70 [2022-11-22 01:33:49,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,665 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-22 01:33:49,665 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 39 treesize of output 58 [2022-11-22 01:33:49,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,774 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:49,774 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 51 treesize of output 70 [2022-11-22 01:33:49,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,914 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-22 01:33:49,914 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 39 treesize of output 58 [2022-11-22 01:33:49,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:49,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:50,016 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:50,016 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 51 treesize of output 70 [2022-11-22 01:33:50,035 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:33:50,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2049#(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_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 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 [2022-11-22 01:33:50,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:33:50,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:33:50,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-22 01:33:50,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408337682] [2022-11-22 01:33:50,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:33:50,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 01:33:50,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:50,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 01:33:50,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-11-22 01:33:50,991 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:51,642 INFO L93 Difference]: Finished difference Result 320 states and 416 transitions. [2022-11-22 01:33:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:33:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-22 01:33:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:51,644 INFO L225 Difference]: With dead ends: 320 [2022-11-22 01:33:51,644 INFO L226 Difference]: Without dead ends: 236 [2022-11-22 01:33:51,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=723, Invalid=1083, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 01:33:51,660 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 348 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:51,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 69 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:33:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-22 01:33:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 193. [2022-11-22 01:33:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.15625) internal successors, (222), 192 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 222 transitions. [2022-11-22 01:33:51,743 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 222 transitions. Word has length 67 [2022-11-22 01:33:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:51,744 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 222 transitions. [2022-11-22 01:33:51,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 222 transitions. [2022-11-22 01:33:51,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-22 01:33:51,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:51,753 INFO L195 NwaCegarLoop]: trace histogram [88, 22, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:51,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:51,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 01:33:51,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:33:51,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:51,960 INFO L85 PathProgramCache]: Analyzing trace with hash 502361932, now seen corresponding path program 5 times [2022-11-22 01:33:51,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:51,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430823582] [2022-11-22 01:33:51,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:51,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:52,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:33:52,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791072500] [2022-11-22 01:33:52,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:33:52,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:52,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:52,047 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:52,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:33:52,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:33:52,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:33:52,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:33:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4450 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4449 trivial. 0 not checked. [2022-11-22 01:33:52,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4450 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4449 trivial. 0 not checked. [2022-11-22 01:33:52,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:52,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430823582] [2022-11-22 01:33:52,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:33:52,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791072500] [2022-11-22 01:33:52,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791072500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:52,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541165081] [2022-11-22 01:33:52,815 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:33:52,816 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:33:52,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:33:52,816 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:33:52,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:33:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:52,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:52,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:52,928 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-22 01:33:52,928 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 46 treesize of output 78 [2022-11-22 01:33:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:52,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:52,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:53,080 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 01:33:53,080 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 [2022-11-22 01:33:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:53,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:53,144 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 72 treesize of output 55 [2022-11-22 01:33:53,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:53,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:53,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:53,410 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-22 01:33:53,411 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 435 treesize of output 410 [2022-11-22 01:33:53,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:53,521 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:53,521 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 57 treesize of output 39 [2022-11-22 01:33:53,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:53,586 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:33:53,586 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 57 treesize of output 39 [2022-11-22 01:33:53,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:53,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:53,750 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:53,750 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 51 treesize of output 70 [2022-11-22 01:33:53,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:53,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:53,843 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:53,844 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 51 treesize of output 70 [2022-11-22 01:33:53,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:53,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:53,985 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-22 01:33:53,986 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 39 treesize of output 58 [2022-11-22 01:33:54,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:54,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:54,101 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:54,101 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 51 treesize of output 70 [2022-11-22 01:33:54,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:54,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:54,245 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:54,246 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 51 treesize of output 70 [2022-11-22 01:33:54,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:54,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:54,346 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 01:33:54,346 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 51 treesize of output 70 [2022-11-22 01:33:54,359 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:33:55,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3763#(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_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 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 [2022-11-22 01:33:55,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:33:55,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:33:55,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-22 01:33:55,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423371314] [2022-11-22 01:33:55,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:33:55,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:33:55,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:33:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:33:55,272 INFO L87 Difference]: Start difference. First operand 193 states and 222 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:55,474 INFO L93 Difference]: Finished difference Result 546 states and 669 transitions. [2022-11-22 01:33:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:33:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 127 [2022-11-22 01:33:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:55,477 INFO L225 Difference]: With dead ends: 546 [2022-11-22 01:33:55,478 INFO L226 Difference]: Without dead ends: 476 [2022-11-22 01:33:55,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 364 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:33:55,479 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 100 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:55,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 16 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:33:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-22 01:33:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 265. [2022-11-22 01:33:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2022-11-22 01:33:55,574 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 127 [2022-11-22 01:33:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:55,575 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2022-11-22 01:33:55,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2022-11-22 01:33:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-22 01:33:55,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:55,577 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:55,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:55,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:55,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:33:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash 109665440, now seen corresponding path program 6 times [2022-11-22 01:33:55,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:55,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125716697] [2022-11-22 01:33:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:55,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:55,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:33:55,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096231765] [2022-11-22 01:33:55,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:33:55,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:55,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:55,904 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:55,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6eb2e2-6100-4831-b314-d9ba22e30126/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process