./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/nsqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqm-if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9 --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 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 --- 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-6b4ec56 [2022-11-20 19:44:58,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:44:58,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:44:58,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:44:58,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:44:58,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:44:58,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:44:58,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:44:58,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:44:58,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:44:58,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:44:58,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:44:58,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:44:58,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:44:58,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:44:58,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:44:58,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:44:58,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:44:58,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:44:58,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:44:58,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:44:58,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:44:58,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:44:58,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:44:58,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:44:58,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:44:58,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:44:58,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:44:58,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:44:58,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:44:58,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:44:58,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:44:58,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:44:58,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:44:58,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:44:58,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:44:58,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:44:58,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:44:58,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:44:58,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:44:58,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:44:58,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:44:58,591 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:44:58,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:44:58,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:44:58,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:44:58,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:44:58,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:44:58,593 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:44:58,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:44:58,594 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:44:58,594 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:44:58,595 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:44:58,595 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:44:58,595 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:44:58,596 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:44:58,596 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:44:58,596 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:44:58,596 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:44:58,597 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:44:58,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:44:58,598 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:44:58,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:44:58,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:44:58,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:44:58,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:44:58,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:44:58,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:44:58,600 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:44:58,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:44:58,600 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:44:58,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:44:58,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:44:58,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:44:58,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:44:58,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:44:58,602 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:44:58,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:44:58,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:44:58,603 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:44:58,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:44:58,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:44:58,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:44:58,604 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_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 [2022-11-20 19:44:58,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:44:58,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:44:58,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:44:58,968 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:44:58,968 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:44:58,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-fpi/nsqm-if.c [2022-11-20 19:45:02,178 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:45:02,410 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:45:02,411 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/sv-benchmarks/c/array-fpi/nsqm-if.c [2022-11-20 19:45:02,417 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/data/ef59377ce/25f3a81b981a41fc9a8ea56336d4bb96/FLAGabc8b28bc [2022-11-20 19:45:02,430 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/data/ef59377ce/25f3a81b981a41fc9a8ea56336d4bb96 [2022-11-20 19:45:02,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:45:02,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:45:02,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:45:02,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:45:02,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:45:02,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a244a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02, skipping insertion in model container [2022-11-20 19:45:02,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:45:02,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:45:02,710 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_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2022-11-20 19:45:02,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:45:02,771 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:45:02,784 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_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2022-11-20 19:45:02,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:45:02,804 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:45:02,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02 WrapperNode [2022-11-20 19:45:02,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:45:02,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:45:02,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:45:02,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:45:02,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,838 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-11-20 19:45:02,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:45:02,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:45:02,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:45:02,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:45:02,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:45:02,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:45:02,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:45:02,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:45:02,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (1/1) ... [2022-11-20 19:45:02,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:45:02,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:02,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:45:02,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:45:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:45:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:45:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 19:45:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 19:45:02,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:45:02,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:45:02,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 19:45:03,054 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:45:03,056 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:45:03,339 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:45:03,455 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:45:03,455 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 19:45:03,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:45:03 BoogieIcfgContainer [2022-11-20 19:45:03,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:45:03,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:45:03,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:45:03,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:45:03,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:45:02" (1/3) ... [2022-11-20 19:45:03,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550d7860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:45:03, skipping insertion in model container [2022-11-20 19:45:03,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:02" (2/3) ... [2022-11-20 19:45:03,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550d7860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:45:03, skipping insertion in model container [2022-11-20 19:45:03,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:45:03" (3/3) ... [2022-11-20 19:45:03,470 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2022-11-20 19:45:03,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:45:03,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:45:03,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:45:03,571 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;@a41c282, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:45:03,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:45:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 19:45:03,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:03,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:03,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:03,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2022-11-20 19:45:03,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:03,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150527272] [2022-11-20 19:45:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:03,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:03,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:03,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150527272] [2022-11-20 19:45:03,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 19:45:03,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563558450] [2022-11-20 19:45:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:03,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:03,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:03,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:03,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:45:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:03,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:45:03,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:04,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:45:04,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563558450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:04,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:45:04,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:45:04,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661639645] [2022-11-20 19:45:04,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:04,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:45:04,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:45:04,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:45:04,083 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-20 19:45:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:04,141 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2022-11-20 19:45:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:45:04,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2022-11-20 19:45:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:04,153 INFO L225 Difference]: With dead ends: 20 [2022-11-20 19:45:04,153 INFO L226 Difference]: Without dead ends: 10 [2022-11-20 19:45:04,156 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 [2022-11-20 19:45:04,162 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:04,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:45:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-20 19:45:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-20 19:45:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-20 19:45:04,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-20 19:45:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:04,200 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-20 19:45:04,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-20 19:45:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-20 19:45:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 19:45:04,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:04,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:04,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:04,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 19:45:04,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2022-11-20 19:45:04,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:04,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134924575] [2022-11-20 19:45:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:04,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:04,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:45:04,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717772185] [2022-11-20 19:45:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:04,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:04,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:04,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:04,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:45:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:04,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:45:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:45:04,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:45:04,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:04,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134924575] [2022-11-20 19:45:04,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:45:04,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717772185] [2022-11-20 19:45:04,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717772185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:04,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:45:04,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:45:04,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382867423] [2022-11-20 19:45:04,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:04,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:45:04,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:04,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:45:04,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:45:04,631 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:04,672 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-20 19:45:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:45:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 19:45:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:04,674 INFO L225 Difference]: With dead ends: 21 [2022-11-20 19:45:04,674 INFO L226 Difference]: Without dead ends: 16 [2022-11-20 19:45:04,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:45:04,676 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:04,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:45:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-20 19:45:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2022-11-20 19:45:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-20 19:45:04,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-20 19:45:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:04,682 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-20 19:45:04,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-20 19:45:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:45:04,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:04,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:04,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:04,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 19:45:04,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:04,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2022-11-20 19:45:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:04,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828429793] [2022-11-20 19:45:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:04,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:04,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:45:04,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515619851] [2022-11-20 19:45:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:04,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:04,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:04,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:04,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:45:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:05,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 19:45:05,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:05,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:45:05,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:05,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:05,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 19:45:05,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:05,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 10 [2022-11-20 19:45:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:45:05,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:05,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828429793] [2022-11-20 19:45:05,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:45:05,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515619851] [2022-11-20 19:45:05,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515619851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:05,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61449112] [2022-11-20 19:45:05,578 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 19:45:05,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:45:05,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:45:05,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:45:05,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:45:05,814 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-20 19:45:05,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-20 19:45:05,999 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:45:06,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:45:06,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:45:06,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:06,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:06,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:06,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:06,476 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:45:06,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:45:06,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:06,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:06,600 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 0 case distinctions, treesize of input 136 treesize of output 127 [2022-11-20 19:45:06,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:06,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 63 [2022-11-20 19:45:06,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:06,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:45:06,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:45:06,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:07,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:07,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:07,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:07,088 INFO L321 Elim1Store]: treesize reduction 349, result has 7.9 percent of original size [2022-11-20 19:45:07,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 204 [2022-11-20 19:45:07,156 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-20 19:45:07,157 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 2 case distinctions, treesize of input 153 treesize of output 154 [2022-11-20 19:45:07,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:07,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 62 [2022-11-20 19:45:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:07,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:07,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 38 [2022-11-20 19:45:07,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:07,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2022-11-20 19:45:07,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:07,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:07,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:07,318 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:45:07,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:45:07,330 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:07,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:45:07,727 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '202#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:45:07,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:45:07,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:45:07,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-20 19:45:07,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546172059] [2022-11-20 19:45:07,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:45:07,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:45:07,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:07,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:45:07,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:45:07,729 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:07,909 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-20 19:45:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 19:45:07,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 19:45:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:07,910 INFO L225 Difference]: With dead ends: 28 [2022-11-20 19:45:07,911 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 19:45:07,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-20 19:45:07,912 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:07,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 18 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:45:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 19:45:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 14. [2022-11-20 19:45:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2022-11-20 19:45:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-20 19:45:07,918 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2022-11-20 19:45:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:07,918 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-20 19:45:07,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-20 19:45:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:45:07,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:07,919 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:07,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:08,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:08,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:08,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1258946262, now seen corresponding path program 2 times [2022-11-20 19:45:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:08,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020640837] [2022-11-20 19:45:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:08,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:08,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:45:08,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261494464] [2022-11-20 19:45:08,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:45:08,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:08,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:08,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:08,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 19:45:08,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 19:45:08,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:08,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:45:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:08,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:08,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020640837] [2022-11-20 19:45:08,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:45:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261494464] [2022-11-20 19:45:08,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261494464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1854900814] [2022-11-20 19:45:08,363 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 19:45:08,363 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:45:08,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:45:08,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:45:08,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:45:08,494 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:45:08,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:45:08,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-20 19:45:08,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:45:08,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:08,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:08,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:08,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:08,764 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:45:08,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:45:09,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 137 [2022-11-20 19:45:09,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:09,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 66 [2022-11-20 19:45:09,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:09,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:45:09,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:45:09,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:09,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:09,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:09,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:09,216 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:45:09,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:45:09,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:09,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:09,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:09,284 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:45:09,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:45:09,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:09,363 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:45:09,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '336#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:45:09,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:45:09,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:45:09,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-20 19:45:09,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105253743] [2022-11-20 19:45:09,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:45:09,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:45:09,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:09,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:45:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:45:09,806 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:09,904 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-20 19:45:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:45:09,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 19:45:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:09,906 INFO L225 Difference]: With dead ends: 35 [2022-11-20 19:45:09,906 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 19:45:09,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:45:09,908 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:09,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 13 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:45:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 19:45:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2022-11-20 19:45:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-20 19:45:09,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-11-20 19:45:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:09,919 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-20 19:45:09,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-20 19:45:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 19:45:09,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:09,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:09,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 19:45:10,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:10,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:10,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2034389572, now seen corresponding path program 3 times [2022-11-20 19:45:10,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:10,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690595872] [2022-11-20 19:45:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:10,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:10,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:45:10,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058958385] [2022-11-20 19:45:10,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:45:10,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:10,202 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:10,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:45:10,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:45:10,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:10,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 19:45:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:10,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:10,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 19:45:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:45:10,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:10,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 19:45:10,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:10,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 19:45:10,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:10,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 10 [2022-11-20 19:45:10,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-20 19:45:10,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-20 19:45:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 19:45:10,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690595872] [2022-11-20 19:45:10,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:45:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058958385] [2022-11-20 19:45:10,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058958385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:10,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [685445284] [2022-11-20 19:45:10,804 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 19:45:10,804 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:45:10,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:45:10,805 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:45:10,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:45:10,950 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-20 19:45:10,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-20 19:45:11,089 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:45:11,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:45:11,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:45:11,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:11,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,354 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:45:11,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:45:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,430 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 0 case distinctions, treesize of input 136 treesize of output 127 [2022-11-20 19:45:11,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 63 [2022-11-20 19:45:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:45:11,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:45:11,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:11,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:11,744 INFO L321 Elim1Store]: treesize reduction 349, result has 7.9 percent of original size [2022-11-20 19:45:11,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 204 [2022-11-20 19:45:11,804 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-20 19:45:11,804 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 2 case distinctions, treesize of input 153 treesize of output 156 [2022-11-20 19:45:11,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 89 [2022-11-20 19:45:11,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:11,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 64 [2022-11-20 19:45:11,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:11,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 125 [2022-11-20 19:45:11,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:11,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:11,923 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:45:11,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:45:11,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:11,950 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:45:12,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '485#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:45:12,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:45:12,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:45:12,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-20 19:45:12,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388396160] [2022-11-20 19:45:12,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:45:12,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:45:12,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:45:12,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:45:12,277 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2022-11-20 19:45:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:12,451 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-11-20 19:45:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 19:45:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 11 [2022-11-20 19:45:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:12,453 INFO L225 Difference]: With dead ends: 34 [2022-11-20 19:45:12,453 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 19:45:12,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:45:12,454 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:12,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-11-20 19:45:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 19:45:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2022-11-20 19:45:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-11-20 19:45:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-20 19:45:12,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-11-20 19:45:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:12,460 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-20 19:45:12,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2022-11-20 19:45:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-20 19:45:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 19:45:12,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:12,461 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:12,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:12,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:12,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1347561873, now seen corresponding path program 4 times [2022-11-20 19:45:12,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:12,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743730042] [2022-11-20 19:45:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:12,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:12,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:45:12,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330421041] [2022-11-20 19:45:12,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:45:12,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:12,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:12,703 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:12,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 19:45:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:45:12,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:12,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:12,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:12,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743730042] [2022-11-20 19:45:12,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:45:12,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330421041] [2022-11-20 19:45:12,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330421041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:12,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989108162] [2022-11-20 19:45:12,907 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 19:45:12,907 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:45:12,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:45:12,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:45:12,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:45:13,042 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:45:13,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:45:13,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-20 19:45:13,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:45:13,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:13,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:13,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:13,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:13,313 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:45:13,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:45:13,407 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-20 19:45:13,408 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 2 case distinctions, treesize of input 453 treesize of output 440 [2022-11-20 19:45:13,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:13,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 63 [2022-11-20 19:45:13,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:13,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:45:13,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:45:13,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:13,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:13,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:13,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:13,691 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:45:13,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:45:13,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:13,717 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:45:14,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '648#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:45:14,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:45:14,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:45:14,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-20 19:45:14,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925716647] [2022-11-20 19:45:14,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:45:14,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 19:45:14,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 19:45:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 19:45:14,123 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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) [2022-11-20 19:45:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:14,292 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-11-20 19:45:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:45:14,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 19:45:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:14,294 INFO L225 Difference]: With dead ends: 48 [2022-11-20 19:45:14,294 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 19:45:14,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-20 19:45:14,295 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:14,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:45:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 19:45:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-11-20 19:45:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2022-11-20 19:45:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-20 19:45:14,303 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-11-20 19:45:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:14,304 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-20 19:45:14,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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) [2022-11-20 19:45:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-20 19:45:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 19:45:14,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:14,305 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:14,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:14,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:14,511 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash 824116829, now seen corresponding path program 5 times [2022-11-20 19:45:14,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:14,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720083503] [2022-11-20 19:45:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:14,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:45:14,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281283867] [2022-11-20 19:45:14,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:45:14,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:14,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:14,560 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:14,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 19:45:15,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:45:15,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:15,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 19:45:15,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:15,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:45:15,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:15,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 19:45:15,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 87 [2022-11-20 19:45:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:15,236 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-20 19:45:15,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 97 [2022-11-20 19:45:15,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 12 [2022-11-20 19:45:15,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-20 19:45:15,347 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:45:15,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:17,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 187 [2022-11-20 19:45:17,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 19:45:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:17,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:17,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 19:45:33,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-11-20 19:45:33,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 19:46:22,666 WARN L233 SmtUtils]: Spent 41.81s on a formula simplification. DAG size of input: 77 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:46:22,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:22,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 19:46:22,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:22,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 10 [2022-11-20 19:46:22,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-20 19:46:22,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 78 [2022-11-20 19:46:23,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-20 19:46:23,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 110 [2022-11-20 19:46:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:23,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:23,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720083503] [2022-11-20 19:46:23,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:46:23,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281283867] [2022-11-20 19:46:23,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281283867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:46:23,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1832637786] [2022-11-20 19:46:23,480 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 19:46:23,480 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:46:23,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:46:23,480 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:46:23,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:46:23,634 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-20 19:46:23,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-20 19:46:23,791 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:46:23,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:46:23,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:46:23,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:23,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:23,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:23,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:24,048 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:46:24,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:46:24,207 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-20 19:46:24,208 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 2 case distinctions, treesize of input 453 treesize of output 440 [2022-11-20 19:46:24,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:24,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 63 [2022-11-20 19:46:24,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:24,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:46:24,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:46:24,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:24,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:24,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:24,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:24,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:24,522 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:46:24,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:46:24,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:24,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:24,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:24,591 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:46:24,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:46:24,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:24,652 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:46:25,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '860#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:46:25,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:46:25,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:46:25,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-20 19:46:25,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065621846] [2022-11-20 19:46:25,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:46:25,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 19:46:25,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:25,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 19:46:25,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=619, Unknown=9, NotChecked=0, Total=812 [2022-11-20 19:46:25,277 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 24 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 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) [2022-11-20 19:46:29,553 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (+ c_~N~0 1)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse3 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (forall ((v_ArrVal_254 Int) (v_ArrVal_251 Int)) (= (select (store (store .cse0 .cse1 v_ArrVal_251) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_254) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3 1) c_~N~0)))) (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse4 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (forall ((v_ArrVal_254 Int) (v_ArrVal_251 Int)) (= (select (store (store .cse0 .cse1 v_ArrVal_251) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_254) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse4)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse4 1) c_~N~0)))) (or (= .cse2 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0)) (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (<= c_~N~0 2147483647) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from false [2022-11-20 19:46:43,010 WARN L233 SmtUtils]: Spent 9.11s on a formula simplification. DAG size of input: 70 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:46:43,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:43,188 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-20 19:46:43,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 19:46:43,189 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 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 [2022-11-20 19:46:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:43,190 INFO L225 Difference]: With dead ends: 37 [2022-11-20 19:46:43,190 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 19:46:43,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 85.1s TimeCoverageRelationStatistics Valid=277, Invalid=1046, Unknown=13, NotChecked=70, Total=1406 [2022-11-20 19:46:43,192 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:43,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 31 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 25 Unchecked, 0.3s Time] [2022-11-20 19:46:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 19:46:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2022-11-20 19:46:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-20 19:46:43,204 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 13 [2022-11-20 19:46:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:43,205 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-20 19:46:43,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 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) [2022-11-20 19:46:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-20 19:46:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 19:46:43,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:43,206 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:43,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:43,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:43,414 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:43,414 INFO L85 PathProgramCache]: Analyzing trace with hash 221349744, now seen corresponding path program 1 times [2022-11-20 19:46:43,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:43,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799285478] [2022-11-20 19:46:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:43,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:43,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:46:43,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107911460] [2022-11-20 19:46:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:43,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:43,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:43,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:43,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 19:46:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 19:46:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:43,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 19:46:43,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:46:43,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:43,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-20 19:46:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:43,846 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 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-20 19:46:43,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:43,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-11-20 19:46:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:44,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:44,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-20 19:46:46,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:46,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2022-11-20 19:46:46,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:46,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2022-11-20 19:46:46,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:46,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 57 [2022-11-20 19:46:46,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:46,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 293 [2022-11-20 19:46:46,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:46,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 286 treesize of output 276 [2022-11-20 19:46:46,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 19:46:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:46,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:46,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799285478] [2022-11-20 19:46:46,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:46:46,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107911460] [2022-11-20 19:46:46,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107911460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:46:46,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059575532] [2022-11-20 19:46:46,388 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 19:46:46,388 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:46:46,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:46:46,388 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:46:46,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:46:46,546 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-20 19:46:46,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-20 19:46:46,677 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:46:46,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:46:46,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:46:46,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:46,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:46,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:46,956 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:46:46,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:46:47,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:47,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:47,065 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 0 case distinctions, treesize of input 136 treesize of output 127 [2022-11-20 19:46:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:47,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 63 [2022-11-20 19:46:47,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:47,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:46:47,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:46:47,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:47,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:47,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:47,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:47,348 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:46:47,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:46:47,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:47,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:47,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:47,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:47,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:47,426 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:46:47,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:46:47,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:46:48,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1084#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:46:48,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:46:48,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:46:48,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-20 19:46:48,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729650571] [2022-11-20 19:46:48,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:46:48,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 19:46:48,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:48,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 19:46:48,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=515, Unknown=6, NotChecked=0, Total=600 [2022-11-20 19:46:48,227 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2022-11-20 19:46:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:48,626 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-11-20 19:46:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 19:46:48,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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 14 [2022-11-20 19:46:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:48,628 INFO L225 Difference]: With dead ends: 34 [2022-11-20 19:46:48,628 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 19:46:48,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=92, Invalid=604, Unknown=6, NotChecked=0, Total=702 [2022-11-20 19:46:48,629 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:48,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2022-11-20 19:46:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 19:46:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-20 19:46:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-20 19:46:48,637 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2022-11-20 19:46:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:48,637 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-20 19:46:48,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2022-11-20 19:46:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-20 19:46:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 19:46:48,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:48,638 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:48,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:48,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 19:46:48,839 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:48,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:48,840 INFO L85 PathProgramCache]: Analyzing trace with hash -149523490, now seen corresponding path program 2 times [2022-11-20 19:46:48,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:48,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861533020] [2022-11-20 19:46:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:48,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:48,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:46:48,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365128965] [2022-11-20 19:46:48,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:46:48,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:48,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:48,867 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:48,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:46:49,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:46:49,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:46:49,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:46:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:46:49,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:46:49,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861533020] [2022-11-20 19:46:49,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:46:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365128965] [2022-11-20 19:46:49,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365128965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:46:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144600417] [2022-11-20 19:46:49,220 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 19:46:49,221 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:46:49,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:46:49,221 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:46:49,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:46:49,371 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:46:49,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:46:49,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-20 19:46:49,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:46:49,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:49,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:49,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:49,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:49,631 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:46:49,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:46:49,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 137 [2022-11-20 19:46:49,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:49,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 66 [2022-11-20 19:46:49,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:49,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:46:49,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:46:49,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:50,061 INFO L321 Elim1Store]: treesize reduction 349, result has 7.9 percent of original size [2022-11-20 19:46:50,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 163 treesize of output 201 [2022-11-20 19:46:50,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2022-11-20 19:46:50,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:50,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 36 [2022-11-20 19:46:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:50,163 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:46:50,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:46:50,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:50,358 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:46:50,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1280#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:46:50,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:46:50,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:46:50,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 19:46:50,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709641010] [2022-11-20 19:46:50,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:46:50,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 19:46:50,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:50,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 19:46:50,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-20 19:46:50,725 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2022-11-20 19:46:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:50,954 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-11-20 19:46:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 19:46:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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 15 [2022-11-20 19:46:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:50,955 INFO L225 Difference]: With dead ends: 41 [2022-11-20 19:46:50,955 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 19:46:50,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-11-20 19:46:50,956 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:50,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 27 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:46:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 19:46:50,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 19. [2022-11-20 19:46:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-20 19:46:50,964 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2022-11-20 19:46:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:50,965 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-20 19:46:50,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2022-11-20 19:46:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-20 19:46:50,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 19:46:50,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:50,966 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:50,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:51,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:51,173 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2050156925, now seen corresponding path program 6 times [2022-11-20 19:46:51,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:51,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008172488] [2022-11-20 19:46:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:51,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:46:51,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834655244] [2022-11-20 19:46:51,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:46:51,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:51,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:51,236 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:51,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 19:46:51,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:46:51,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:46:51,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 19:46:51,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:46:51,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:46:51,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008172488] [2022-11-20 19:46:51,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:46:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834655244] [2022-11-20 19:46:51,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834655244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:46:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1623189287] [2022-11-20 19:46:51,528 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 19:46:51,528 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:46:51,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:46:51,528 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:46:51,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:46:51,659 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:46:51,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:46:51,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-20 19:46:51,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:46:51,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:51,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,892 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:46:51,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:46:52,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 80 [2022-11-20 19:46:52,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:52,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2022-11-20 19:46:52,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:46:52,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:46:52,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:52,289 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:46:52,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:46:52,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:52,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:52,366 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:46:52,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:46:52,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:46:52,419 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:46:52,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1484#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:46:52,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:46:52,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:46:52,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-11-20 19:46:52,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263639232] [2022-11-20 19:46:52,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:46:52,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 19:46:52,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:52,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 19:46:52,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-20 19:46:52,916 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 14 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) [2022-11-20 19:46:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:53,166 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-11-20 19:46:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 19:46:53,166 INFO L78 Accepts]: Start accepts. Automaton has has 14 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) Word has length 15 [2022-11-20 19:46:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:53,167 INFO L225 Difference]: With dead ends: 67 [2022-11-20 19:46:53,167 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 19:46:53,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-11-20 19:46:53,168 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:53,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 51 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:46:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 19:46:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2022-11-20 19:46:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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) [2022-11-20 19:46:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-11-20 19:46:53,182 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2022-11-20 19:46:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:53,182 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-11-20 19:46:53,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 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) [2022-11-20 19:46:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-11-20 19:46:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 19:46:53,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:53,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:53,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-20 19:46:53,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 19:46:53,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1236512951, now seen corresponding path program 3 times [2022-11-20 19:46:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:53,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976524734] [2022-11-20 19:46:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:53,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:46:53,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966671499] [2022-11-20 19:46:53,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:46:53,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:53,434 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:53,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 19:46:53,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:46:53,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:46:53,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-20 19:46:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:53,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 19:46:53,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:46:53,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 107 [2022-11-20 19:46:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:53,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:53,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:53,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:53,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 188 [2022-11-20 19:46:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:53,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:53,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-11-20 19:46:54,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:54,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:54,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 48 [2022-11-20 19:46:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:54,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:54,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2022-11-20 19:46:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:54,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:54,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 74 [2022-11-20 19:46:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:54,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:55,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-20 19:46:57,107 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse14 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse13 (* .cse14 8)) (.cse7 (<= .cse14 2147483647)) (.cse12 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse10 (<= .cse12 2147483647)) (.cse0 (not .cse7)) (.cse3 (+ .cse13 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse6 (+ .cse13 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ c_~N~0 4)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse8 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse9 (* 8 .cse12))) (and (or (let ((.cse1 (+ 2 (select .cse8 (+ .cse9 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse9))))) (and (or .cse0 (forall ((v_ArrVal_515 Int)) (or (not (<= .cse1 v_ArrVal_515)) (= (select (store .cse2 .cse3 v_ArrVal_515) .cse4) .cse5)))) (or (forall ((v_ArrVal_515 Int)) (or (not (<= .cse1 v_ArrVal_515)) (= (select (store .cse2 .cse6 v_ArrVal_515) .cse4) .cse5))) .cse7))) (not .cse10)) (or .cse10 (let ((.cse11 (+ (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse9)) (select .cse8 (+ (- 34359738368) .cse9 |c_ULTIMATE.start_main_~b~0#1.offset|)) 2))) (and (or .cse0 (and (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (forall ((v_ArrVal_515 Int)) (or (not (<= .cse11 v_ArrVal_515)) (= (select (store .cse2 .cse3 v_ArrVal_515) .cse4) .cse5))))) (or (forall ((v_ArrVal_515 Int)) (or (= (select (store .cse2 .cse6 v_ArrVal_515) .cse4) .cse5) (not (<= .cse11 v_ArrVal_515)))) .cse7)))))))) is different from false [2022-11-20 19:48:49,700 WARN L233 SmtUtils]: Spent 1.61m on a formula simplification. DAG size of input: 145 DAG size of output: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:48:51,846 WARN L837 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((~N~0 Int) (v_ArrVal_515 Int)) (let ((.cse4 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ ~N~0 1))) (.cse5 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (let ((.cse3 (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) (.cse0 (select .cse4 (+ .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|)))) (let ((.cse2 (store .cse4 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ .cse0 .cse1 2)))) (or (not (<= (+ .cse0 .cse1 4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|))) v_ArrVal_515)) (= (select (store .cse2 (+ (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_515) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ ~N~0 4)))))))) is different from false [2022-11-20 19:48:55,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:48:55,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 57 [2022-11-20 19:49:56,002 WARN L233 SmtUtils]: Spent 54.97s on a formula simplification. DAG size of input: 110 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:49:56,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:56,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2022-11-20 19:49:56,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:56,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2022-11-20 19:49:56,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:56,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:56,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:56,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 71 [2022-11-20 19:49:56,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:56,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:56,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:56,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 92 [2022-11-20 19:49:56,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:56,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:56,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:56,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:56,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 93 [2022-11-20 19:49:56,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:56,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:56,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:56,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 72 [2022-11-20 19:49:57,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:57,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 804 treesize of output 794 [2022-11-20 19:49:57,123 INFO L321 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2022-11-20 19:49:57,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 787 treesize of output 756 [2022-11-20 19:49:57,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:57,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 749 treesize of output 737 [2022-11-20 19:49:57,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:57,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:57,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:57,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:57,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 730 treesize of output 698 [2022-11-20 19:49:57,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:57,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:57,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:57,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 691 treesize of output 672 [2022-11-20 19:49:57,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:57,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:57,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 653 treesize of output 635 [2022-11-20 19:49:58,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 19:49:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-20 19:49:58,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:58,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976524734] [2022-11-20 19:49:58,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:49:58,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966671499] [2022-11-20 19:49:58,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966671499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:49:58,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428825571] [2022-11-20 19:49:58,352 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 19:49:58,352 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:49:58,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:49:58,352 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:49:58,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:49:58,540 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-20 19:49:58,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-20 19:49:58,731 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:49:58,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:49:58,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:49:58,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:58,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:58,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:58,959 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:49:58,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:49:59,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 137 [2022-11-20 19:49:59,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:59,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 66 [2022-11-20 19:49:59,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:49:59,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:49:59,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:49:59,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:59,347 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:49:59,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:49:59,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:49:59,513 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:50:00,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1759#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:50:00,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:50:00,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:50:00,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-20 19:50:00,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320795061] [2022-11-20 19:50:00,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:50:00,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 19:50:00,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:50:00,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 19:50:00,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=599, Unknown=15, NotChecked=102, Total=812 [2022-11-20 19:50:00,621 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:50:07,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:50:07,758 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-11-20 19:50:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 19:50:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 19:50:07,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:50:07,759 INFO L225 Difference]: With dead ends: 50 [2022-11-20 19:50:07,759 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 19:50:07,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 187.7s TimeCoverageRelationStatistics Valid=117, Invalid=745, Unknown=16, NotChecked=114, Total=992 [2022-11-20 19:50:07,761 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:50:07,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 82 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2022-11-20 19:50:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 19:50:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-11-20 19:50:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:50:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-20 19:50:07,794 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 16 [2022-11-20 19:50:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:50:07,794 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-20 19:50:07,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:50:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-20 19:50:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 19:50:07,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:50:07,795 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:50:07,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 19:50:07,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 19:50:07,996 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:50:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:50:07,996 INFO L85 PathProgramCache]: Analyzing trace with hash -856978737, now seen corresponding path program 7 times [2022-11-20 19:50:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:50:07,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858098739] [2022-11-20 19:50:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:50:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:50:08,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:50:08,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899300829] [2022-11-20 19:50:08,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:50:08,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:50:08,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:50:08,025 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:50:08,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 19:50:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:50:08,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:50:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:50:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:50:08,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:50:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:50:08,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:50:08,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858098739] [2022-11-20 19:50:08,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:50:08,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899300829] [2022-11-20 19:50:08,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899300829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:50:08,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824280461] [2022-11-20 19:50:08,385 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 19:50:08,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:50:08,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:50:08,386 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:50:08,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:50:08,536 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-20 19:50:08,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-20 19:50:08,685 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:50:08,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:50:08,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:50:08,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:08,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:08,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:08,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:08,889 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:50:08,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:50:09,009 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-20 19:50:09,010 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 2 case distinctions, treesize of input 453 treesize of output 436 [2022-11-20 19:50:09,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:09,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 63 [2022-11-20 19:50:09,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:50:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:09,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:50:09,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:50:09,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:09,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:09,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:09,228 INFO L321 Elim1Store]: treesize reduction 349, result has 7.9 percent of original size [2022-11-20 19:50:09,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 163 treesize of output 201 [2022-11-20 19:50:09,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 148 [2022-11-20 19:50:09,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:09,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 96 [2022-11-20 19:50:09,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:09,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:09,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:09,329 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:50:09,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:50:09,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:50:09,377 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:50:10,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2034#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:50:10,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:50:10,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:50:10,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2022-11-20 19:50:10,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931265172] [2022-11-20 19:50:10,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:50:10,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 19:50:10,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:50:10,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 19:50:10,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-11-20 19:50:10,026 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2022-11-20 19:50:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:50:10,485 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2022-11-20 19:50:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 19:50:10,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 16 [2022-11-20 19:50:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:50:10,487 INFO L225 Difference]: With dead ends: 100 [2022-11-20 19:50:10,487 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 19:50:10,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2022-11-20 19:50:10,488 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 182 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:50:10,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 55 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:50:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 19:50:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 49. [2022-11-20 19:50:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:50:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-11-20 19:50:10,511 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 16 [2022-11-20 19:50:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:50:10,511 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-11-20 19:50:10,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2022-11-20 19:50:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-11-20 19:50:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 19:50:10,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:50:10,513 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:50:10,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 19:50:10,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 19:50:10,718 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:50:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:50:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash -783871043, now seen corresponding path program 8 times [2022-11-20 19:50:10,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:50:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79917892] [2022-11-20 19:50:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:50:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:50:10,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:50:10,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117021344] [2022-11-20 19:50:10,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:50:10,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:50:10,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:50:10,748 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:50:10,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 19:50:12,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 19:50:12,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:50:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 19:50:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:50:12,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:50:12,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:12,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 19:50:12,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:12,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 19:50:12,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 95 [2022-11-20 19:50:12,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:12,717 INFO L321 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2022-11-20 19:50:12,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 113 [2022-11-20 19:50:12,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:12,834 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2022-11-20 19:50:12,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 87 treesize of output 38 [2022-11-20 19:50:12,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-20 19:50:12,875 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:50:12,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 97 [2022-11-20 19:50:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:13,001 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-20 19:50:13,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 107 [2022-11-20 19:50:13,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:13,155 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-11-20 19:50:13,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 85 treesize of output 44 [2022-11-20 19:50:13,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 24 [2022-11-20 19:50:13,217 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:50:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:50:13,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:50:13,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 19:50:13,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-20 19:50:20,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 178 [2022-11-20 19:50:20,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-20 19:50:22,692 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse10 (* .cse11 8)) (.cse4 (<= .cse11 2147483647))) (let ((.cse5 (not .cse4)) (.cse7 (+ .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (+ .cse10 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse3 (+ c_~N~0 1))) (and (or (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse0 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse0) c_~N~0) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse0 1)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (= (select (store (store (store .cse1 .cse2 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse3)))) .cse4) (or .cse5 (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse6 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse6) c_~N~0) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse6 1)) (= .cse3 (select (store (store (store .cse1 .cse7 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0))))) (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (or .cse5 (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse8 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse8) c_~N~0) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse8 1)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (store (store .cse1 .cse7 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse3) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647))))) (or (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse9 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse9) c_~N~0) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse9 1)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (store (store .cse1 .cse2 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse3) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647)))) .cse4))))) is different from false [2022-11-20 19:50:22,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 86 [2022-11-20 19:50:22,891 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 19:50:22,898 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 19:50:22,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 382 treesize of output 378 [2022-11-20 19:50:25,449 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse15 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (let ((.cse21 (mod .cse15 4294967296))) (let ((.cse7 (<= .cse21 2147483647)) (.cse20 (* .cse21 8)) (.cse19 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse0 (<= .cse19 2147483647)) (.cse9 (+ .cse20 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ .cse20 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ c_~N~0 1)) (.cse6 (not .cse7)) (.cse12 (* .cse19 8))) (and (or (not .cse0) (let ((.cse3 (+ .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_691 Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse1 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse1) c_~N~0) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse1 1)) (= (select (store (store (store (store .cse2 .cse3 v_ArrVal_691) .cse4 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0)))) .cse6) (or .cse7 (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_691 Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse8 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse8) c_~N~0) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= .cse5 (select (store (store (store (store .cse2 .cse3 v_ArrVal_691) .cse9 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse8 1)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0))))) (or .cse7 (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_691 Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse10 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse10) c_~N~0) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse10 1)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (store (store (store .cse2 .cse3 v_ArrVal_691) .cse9 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647))))) (or (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_691 Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse11 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse11) c_~N~0) (= (select (store (store (store (store .cse2 .cse3 v_ArrVal_691) .cse4 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse11 1)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647)))) .cse6)))) (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (or .cse0 (let ((.cse14 (+ .cse12 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (and (or (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_691 Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse13 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse13) c_~N~0) (= (select (store (store (store (store .cse2 .cse14 v_ArrVal_691) .cse4 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse13 1)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0)))) .cse6) (not (= .cse15 0)) (or .cse7 (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_691 Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse16 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse16) c_~N~0) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse16 1)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (store (store (store .cse2 .cse14 v_ArrVal_691) .cse9 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647))))) (or .cse7 (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_691 Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse17 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse17) c_~N~0) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse17 1)) (= .cse5 (select (store (store (store (store .cse2 .cse14 v_ArrVal_691) .cse9 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0))))) (or (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_691 Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse18 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse18) c_~N~0) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse18 1)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (store (store (store .cse2 .cse14 v_ArrVal_691) .cse4 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647)))) .cse6))))))))) is different from false [2022-11-20 19:50:25,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:50:25,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 19:50:25,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:50:25,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 10 [2022-11-20 19:50:26,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:26,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-20 19:50:26,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:26,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 194 [2022-11-20 19:50:26,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:26,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:26,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-11-20 19:50:26,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:26,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:26,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 182 [2022-11-20 19:50:26,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:26,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-11-20 19:50:26,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-20 19:50:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:26,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:26,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:26,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 158 [2022-11-20 19:50:26,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1839 treesize of output 1827 [2022-11-20 19:50:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-11-20 19:50:38,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:50:38,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79917892] [2022-11-20 19:50:38,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:50:38,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117021344] [2022-11-20 19:50:38,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117021344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:50:38,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292497014] [2022-11-20 19:50:38,837 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 19:50:38,838 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:50:38,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:50:38,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:50:38,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:50:38,972 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:50:38,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:50:38,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-20 19:50:39,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:50:39,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:39,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:39,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:39,162 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:50:39,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:50:39,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:39,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 132 [2022-11-20 19:50:39,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:39,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 66 [2022-11-20 19:50:39,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:39,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:50:39,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:50:39,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:50:39,448 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:50:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:39,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:39,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:39,471 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:50:39,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:50:39,489 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:50:40,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2405#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:50:40,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:50:40,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:50:40,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2022-11-20 19:50:40,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032528974] [2022-11-20 19:50:40,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:50:40,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 19:50:40,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:50:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 19:50:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=8, NotChecked=134, Total=1332 [2022-11-20 19:50:40,076 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 32 states, 32 states have (on average 1.03125) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:51:00,814 WARN L233 SmtUtils]: Spent 20.08s on a formula simplification. DAG size of input: 147 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:51:02,903 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse12 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse11 (* .cse12 8)) (.cse4 (<= .cse12 2147483647))) (let ((.cse5 (not .cse4)) (.cse7 (+ .cse11 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (+ .cse11 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse3 (+ c_~N~0 1))) (and (or (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse0 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse0) c_~N~0) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse0 1)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (= (select (store (store (store .cse1 .cse2 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse3)))) .cse4) (or .cse5 (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse6 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse6) c_~N~0) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse6 1)) (= .cse3 (select (store (store (store .cse1 .cse7 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0))))) (or (= .cse3 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) .cse8) (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (or .cse5 (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse9 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse9) c_~N~0) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse9 1)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (store (store .cse1 .cse7 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse3) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647))))) (or (forall ((v_ArrVal_701 Int)) (= (select (store .cse1 .cse7 v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse3)) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0) (not .cse8)) (or (forall ((v_ArrVal_697 Int) (v_ArrVal_694 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_701 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse10 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse10) c_~N~0) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse10 1)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (store (store .cse1 .cse2 v_ArrVal_694) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_697) (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_701) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse3) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647)))) .cse4))))) is different from false [2022-11-20 19:51:27,522 WARN L233 SmtUtils]: Spent 10.70s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:51:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:28,786 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-11-20 19:51:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 19:51:28,787 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.03125) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 19:51:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:28,787 INFO L225 Difference]: With dead ends: 95 [2022-11-20 19:51:28,787 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 19:51:28,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 69.7s TimeCoverageRelationStatistics Valid=667, Invalid=2300, Unknown=15, NotChecked=324, Total=3306 [2022-11-20 19:51:28,789 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:28,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 107 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 233 Invalid, 0 Unknown, 93 Unchecked, 0.6s Time] [2022-11-20 19:51:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 19:51:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2022-11-20 19:51:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:51:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-11-20 19:51:28,808 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 17 [2022-11-20 19:51:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:28,808 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-11-20 19:51:28,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.03125) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:51:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-11-20 19:51:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 19:51:28,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:28,809 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:51:28,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 19:51:29,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:29,010 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:51:29,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:29,010 INFO L85 PathProgramCache]: Analyzing trace with hash -719008137, now seen corresponding path program 4 times [2022-11-20 19:51:29,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:51:29,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420970847] [2022-11-20 19:51:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:29,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:51:29,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:51:29,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021094479] [2022-11-20 19:51:29,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:51:29,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:29,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:51:29,046 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:51:29,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 19:51:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:29,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:51:29,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:51:29,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:51:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:51:29,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:51:29,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420970847] [2022-11-20 19:51:29,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:51:29,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021094479] [2022-11-20 19:51:29,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021094479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:51:29,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [260692098] [2022-11-20 19:51:29,427 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 19:51:29,427 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:51:29,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:51:29,428 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:51:29,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:51:29,582 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-20 19:51:29,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-20 19:51:29,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-20 19:51:29,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:51:29,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:29,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:29,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:29,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:29,801 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-20 19:51:29,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-20 19:51:29,907 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-20 19:51:29,908 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 2 case distinctions, treesize of input 455 treesize of output 436 [2022-11-20 19:51:29,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:29,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 38 [2022-11-20 19:51:30,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:30,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-20 19:51:30,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:51:30,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:51:30,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:30,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:30,111 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:51:30,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:51:30,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:51:30,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:51:30,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:30,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:30,193 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:51:30,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-20 19:51:30,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:51:30,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2800#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:51:30,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:51:30,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:51:30,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-11-20 19:51:30,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909960994] [2022-11-20 19:51:30,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:51:30,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 19:51:30,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:51:30,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 19:51:30,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-11-20 19:51:30,805 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2022-11-20 19:51:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:31,675 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-11-20 19:51:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 19:51:31,676 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 19:51:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:31,676 INFO L225 Difference]: With dead ends: 98 [2022-11-20 19:51:31,677 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 19:51:31,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 19:51:31,678 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 109 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:31,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 158 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 19:51:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 19:51:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2022-11-20 19:51:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:51:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-20 19:51:31,703 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 18 [2022-11-20 19:51:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:31,704 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-20 19:51:31,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2022-11-20 19:51:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-20 19:51:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 19:51:31,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:31,705 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 19:51:31,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-20 19:51:31,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 19:51:31,910 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:51:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:31,911 INFO L85 PathProgramCache]: Analyzing trace with hash -972050403, now seen corresponding path program 5 times [2022-11-20 19:51:31,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:51:31,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695633370] [2022-11-20 19:51:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:31,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:51:31,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:51:31,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809679361] [2022-11-20 19:51:31,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:51:31,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:31,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:51:31,931 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:51:31,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 19:51:32,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:51:32,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:51:32,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-20 19:51:32,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:32,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 19:51:32,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:51:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:32,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-11-20 19:51:32,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:32,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:32,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-20 19:51:32,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:32,788 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 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 19:51:32,899 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 19:51:32,900 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 2 case distinctions, treesize of input 163 treesize of output 149 [2022-11-20 19:51:32,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:32,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:32,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:32,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:32,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 217 [2022-11-20 19:51:33,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:33,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:33,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:33,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:33,053 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 19:51:33,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 60 [2022-11-20 19:51:33,546 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-20 19:51:33,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 48 [2022-11-20 19:51:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:51:33,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:51:34,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-20 19:52:06,908 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-20 19:52:06,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:06,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695633370] [2022-11-20 19:52:06,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-11-20 19:52:06,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:52:06,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809679361] [2022-11-20 19:52:06,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-11-20 19:52:06,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002105704] [2022-11-20 19:52:06,911 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 19:52:06,911 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:06,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:06,911 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:06,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:06,913 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:273) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 44 more [2022-11-20 19:52:06,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:06,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-20 19:52:06,916 ERROR L170 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2022-11-20 19:52:06,916 INFO L359 BasicCegarLoop]: Counterexample might be feasible [2022-11-20 19:52:06,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 19:52:06,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:07,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 19:52:07,130 INFO L444 BasicCegarLoop]: Path program histogram: [8, 5, 1, 1] [2022-11-20 19:52:07,132 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 19:52:07,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:52:07 BoogieIcfgContainer [2022-11-20 19:52:07,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 19:52:07,146 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 19:52:07,146 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 19:52:07,146 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 19:52:07,147 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:45:03" (3/4) ... [2022-11-20 19:52:07,151 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 19:52:07,151 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 19:52:07,152 INFO L158 Benchmark]: Toolchain (without parser) took 424717.30ms. Allocated memory was 190.8MB in the beginning and 276.8MB in the end (delta: 86.0MB). Free memory was 159.6MB in the beginning and 90.3MB in the end (delta: 69.3MB). Peak memory consumption was 156.3MB. Max. memory is 16.1GB. [2022-11-20 19:52:07,153 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 125.8MB. Free memory is still 97.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 19:52:07,153 INFO L158 Benchmark]: CACSL2BoogieTranslator took 349.63ms. Allocated memory is still 190.8MB. Free memory was 162.4MB in the beginning and 159.1MB in the end (delta: 3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 19:52:07,154 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.70ms. Allocated memory is still 190.8MB. Free memory was 159.1MB in the beginning and 157.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 19:52:07,155 INFO L158 Benchmark]: Boogie Preprocessor took 23.99ms. Allocated memory is still 190.8MB. Free memory was 157.0MB in the beginning and 155.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 19:52:07,155 INFO L158 Benchmark]: RCFGBuilder took 594.55ms. Allocated memory is still 190.8MB. Free memory was 155.9MB in the beginning and 139.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-20 19:52:07,155 INFO L158 Benchmark]: TraceAbstraction took 423685.00ms. Allocated memory was 190.8MB in the beginning and 276.8MB in the end (delta: 86.0MB). Free memory was 138.2MB in the beginning and 90.3MB in the end (delta: 47.8MB). Peak memory consumption was 136.8MB. Max. memory is 16.1GB. [2022-11-20 19:52:07,155 INFO L158 Benchmark]: Witness Printer took 4.93ms. Allocated memory is still 276.8MB. Free memory is still 90.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 19:52:07,161 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 125.8MB. Free memory is still 97.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 349.63ms. Allocated memory is still 190.8MB. Free memory was 162.4MB in the beginning and 159.1MB in the end (delta: 3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.70ms. Allocated memory is still 190.8MB. Free memory was 159.1MB in the beginning and 157.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.99ms. Allocated memory is still 190.8MB. Free memory was 157.0MB in the beginning and 155.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 594.55ms. Allocated memory is still 190.8MB. Free memory was 155.9MB in the beginning and 139.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 423685.00ms. Allocated memory was 190.8MB in the beginning and 276.8MB in the end (delta: 86.0MB). Free memory was 138.2MB in the beginning and 90.3MB in the end (delta: 47.8MB). Peak memory consumption was 136.8MB. Max. memory is 16.1GB. * Witness Printer took 4.93ms. Allocated memory is still 276.8MB. Free memory is still 90.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND TRUE !cond [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9 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 -> 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 [2022-11-20 19:52:09,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:52:09,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:52:09,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:52:09,885 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:52:09,887 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:52:09,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-fpi/nsqm-if.c [2022-11-20 19:52:12,998 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:52:13,218 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:52:13,219 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/sv-benchmarks/c/array-fpi/nsqm-if.c [2022-11-20 19:52:13,225 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/data/1e2f2a90c/387cf2ca039742f790a1c6fa33909891/FLAG883e87aff [2022-11-20 19:52:13,243 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/data/1e2f2a90c/387cf2ca039742f790a1c6fa33909891 [2022-11-20 19:52:13,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:52:13,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:52:13,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:52:13,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:52:13,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:52:13,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@212866e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13, skipping insertion in model container [2022-11-20 19:52:13,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:52:13,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:52:13,406 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_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2022-11-20 19:52:13,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:52:13,444 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:52:13,456 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_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2022-11-20 19:52:13,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:52:13,481 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:52:13,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13 WrapperNode [2022-11-20 19:52:13,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:52:13,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:52:13,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:52:13,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:52:13,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,521 INFO L138 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-11-20 19:52:13,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:52:13,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:52:13,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:52:13,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:52:13,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,549 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:52:13,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:52:13,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:52:13,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:52:13,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (1/1) ... [2022-11-20 19:52:13,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:52:13,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:13,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:52:13,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:52:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:52:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 19:52:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-20 19:52:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 19:52:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:52:13,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:52:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-20 19:52:13,730 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:52:13,732 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:52:14,113 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:52:14,122 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:52:14,122 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 19:52:14,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:14 BoogieIcfgContainer [2022-11-20 19:52:14,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:52:14,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:52:14,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:52:14,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:52:14,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:52:13" (1/3) ... [2022-11-20 19:52:14,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34503ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:52:14, skipping insertion in model container [2022-11-20 19:52:14,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:13" (2/3) ... [2022-11-20 19:52:14,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34503ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:52:14, skipping insertion in model container [2022-11-20 19:52:14,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:14" (3/3) ... [2022-11-20 19:52:14,139 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2022-11-20 19:52:14,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:52:14,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:52:14,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:52:14,239 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;@32148f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:52:14,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:52:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:14,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 19:52:14,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:14,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:14,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-11-20 19:52:14,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:14,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110511308] [2022-11-20 19:52:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:14,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:52:14,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:14,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:52:14,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 19:52:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:14,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 19:52:14,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:14,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:52:14,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:14,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110511308] [2022-11-20 19:52:14,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110511308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:14,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:14,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:52:14,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401548084] [2022-11-20 19:52:14,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:14,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 19:52:14,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:14,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 19:52:14,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:52:14,518 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:14,533 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-11-20 19:52:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 19:52:14,536 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 19:52:14,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:14,555 INFO L225 Difference]: With dead ends: 42 [2022-11-20 19:52:14,555 INFO L226 Difference]: Without dead ends: 19 [2022-11-20 19:52:14,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:52:14,562 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:14,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-20 19:52:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-20 19:52:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-20 19:52:14,601 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-11-20 19:52:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:14,602 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-20 19:52:14,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-20 19:52:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 19:52:14,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:14,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:14,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:14,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:52:14,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:14,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-11-20 19:52:14,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:14,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627765349] [2022-11-20 19:52:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:14,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:52:14,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:14,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:52:14,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 19:52:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:52:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:15,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:52:15,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:15,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627765349] [2022-11-20 19:52:15,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627765349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:15,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:15,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:52:15,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96650112] [2022-11-20 19:52:15,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:15,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:52:15,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:15,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:52:15,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:52:15,137 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:15,435 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-11-20 19:52:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:52:15,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 19:52:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:15,444 INFO L225 Difference]: With dead ends: 45 [2022-11-20 19:52:15,445 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 19:52:15,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:52:15,446 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:15,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 15 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:52:15,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 19:52:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-11-20 19:52:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2022-11-20 19:52:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-20 19:52:15,456 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-11-20 19:52:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:15,457 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-20 19:52:15,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-20 19:52:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 19:52:15,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:15,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:15,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:15,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:52:15,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-11-20 19:52:15,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:15,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077967219] [2022-11-20 19:52:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:15,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:52:15,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:15,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:52:15,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 19:52:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:15,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 19:52:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:16,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:16,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:16,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2022-11-20 19:52:16,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:16,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-11-20 19:52:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:16,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:20,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:20,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077967219] [2022-11-20 19:52:20,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077967219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:20,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149573620] [2022-11-20 19:52:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:20,367 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:52:20,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:52:20,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:52:20,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-20 19:52:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:20,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 19:52:20,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:21,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:21,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:21,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2022-11-20 19:52:21,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:21,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-11-20 19:52:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:21,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:52:21,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149573620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:21,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:52:21,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 8] total 20 [2022-11-20 19:52:21,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993217362] [2022-11-20 19:52:21,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:21,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:52:21,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:21,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:52:21,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:52:21,876 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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) [2022-11-20 19:52:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:22,827 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-11-20 19:52:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 19:52:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 18 [2022-11-20 19:52:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:22,830 INFO L225 Difference]: With dead ends: 78 [2022-11-20 19:52:22,830 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 19:52:22,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-11-20 19:52:22,832 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:22,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 60 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 19:52:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 19:52:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-11-20 19:52:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 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) [2022-11-20 19:52:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-11-20 19:52:22,841 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 18 [2022-11-20 19:52:22,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:22,842 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-11-20 19:52:22,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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) [2022-11-20 19:52:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-11-20 19:52:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 19:52:22,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:22,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:22,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:23,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:23,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:52:23,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:23,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1024942859, now seen corresponding path program 1 times [2022-11-20 19:52:23,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:23,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151794897] [2022-11-20 19:52:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:23,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:52:23,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:23,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:52:23,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 19:52:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:23,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:52:23,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:23,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:24,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151794897] [2022-11-20 19:52:24,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151794897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2026668839] [2022-11-20 19:52:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:24,405 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:52:24,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:52:24,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:52:24,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-20 19:52:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:24,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:52:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:24,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:24,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2026668839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:24,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747971826] [2022-11-20 19:52:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:24,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:24,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:24,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:24,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 19:52:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:25,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 19:52:25,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:25,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:25,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747971826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:25,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:52:25,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10, 9, 9, 7] total 27 [2022-11-20 19:52:25,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599590816] [2022-11-20 19:52:25,633 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:25,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 19:52:25,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:25,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 19:52:25,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2022-11-20 19:52:25,635 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 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) [2022-11-20 19:52:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:27,364 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-11-20 19:52:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 19:52:27,365 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 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 21 [2022-11-20 19:52:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:27,366 INFO L225 Difference]: With dead ends: 104 [2022-11-20 19:52:27,366 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 19:52:27,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=408, Invalid=1074, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 19:52:27,368 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 421 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:27,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 99 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 19:52:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 19:52:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2022-11-20 19:52:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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) [2022-11-20 19:52:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-11-20 19:52:27,389 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 21 [2022-11-20 19:52:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:27,389 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-11-20 19:52:27,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 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) [2022-11-20 19:52:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-11-20 19:52:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 19:52:27,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:27,390 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:27,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:27,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:27,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:27,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:52:27,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:27,995 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-11-20 19:52:27,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:27,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727662066] [2022-11-20 19:52:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:27,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:52:27,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:27,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:52:27,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 19:52:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 19:52:28,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:28,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:28,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2022-11-20 19:52:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:28,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:28,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:28,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:28,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 49 [2022-11-20 19:52:29,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:29,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-11-20 19:52:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:29,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:31,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2022-11-20 19:52:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:48,658 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:48,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727662066] [2022-11-20 19:52:48,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727662066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:48,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460345142] [2022-11-20 19:52:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:48,659 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:52:48,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:52:48,667 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:52:48,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-20 19:52:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:48,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:52:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:50,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2022-11-20 19:52:50,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:50,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 49 [2022-11-20 19:52:50,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:50,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-11-20 19:52:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:50,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:51,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1460345142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822545350] [2022-11-20 19:52:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:51,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:51,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:51,450 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:51,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 19:52:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:51,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 19:52:51,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:51,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:51,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2022-11-20 19:52:51,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:51,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:51,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:51,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:51,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 49 [2022-11-20 19:52:52,003 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:52,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-11-20 19:52:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:52,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:52,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2022-11-20 19:53:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:04,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822545350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:04,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:53:04,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13, 12, 14, 13] total 31 [2022-11-20 19:53:04,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508237951] [2022-11-20 19:53:04,947 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:53:04,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 19:53:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:53:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 19:53:04,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2022-11-20 19:53:04,949 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:53:26,736 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2022-11-20 19:53:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 19:53:26,745 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 19:53:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:53:26,745 INFO L225 Difference]: With dead ends: 81 [2022-11-20 19:53:26,746 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 19:53:26,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=711, Invalid=2481, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 19:53:26,748 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 257 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:53:26,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 82 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 274 Invalid, 0 Unknown, 66 Unchecked, 2.7s Time] [2022-11-20 19:53:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 19:53:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2022-11-20 19:53:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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) [2022-11-20 19:53:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-11-20 19:53:26,760 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 24 [2022-11-20 19:53:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:53:26,761 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-11-20 19:53:26,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-11-20 19:53:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 19:53:26,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:53:26,762 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:53:26,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:53:26,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-20 19:53:27,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:53:27,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:27,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:53:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:53:27,364 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-11-20 19:53:27,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:53:27,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862300331] [2022-11-20 19:53:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:53:27,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:53:27,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:53:27,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:53:27,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 19:53:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:27,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 19:53:27,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:27,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 19:53:27,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:27,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 19:53:28,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 50 [2022-11-20 19:53:28,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 49 [2022-11-20 19:53:28,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:53:28,997 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 19:53:28,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 85 [2022-11-20 19:53:29,981 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-20 19:53:29,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 73 [2022-11-20 19:53:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:30,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:47,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:53:47,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862300331] [2022-11-20 19:53:47,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862300331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:47,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2126290772] [2022-11-20 19:53:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:53:47,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:53:47,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:53:47,220 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:53:47,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-20 19:53:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:47,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 19:53:47,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:48,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 19:53:49,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:49,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:49,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 19:53:49,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:49,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:49,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:49,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:49,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:49,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 50 [2022-11-20 19:53:50,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:50,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:50,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 49 [2022-11-20 19:53:50,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:50,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:50,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:50,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:50,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:53:50,327 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 19:53:50,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 85 [2022-11-20 19:53:51,010 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-20 19:53:51,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 73 [2022-11-20 19:53:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:51,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:56,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2126290772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:56,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317175928] [2022-11-20 19:53:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:53:56,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:56,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:53:56,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:53:56,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a3d3c2-6010-439c-ab82-ab3c73cd8ffd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 19:53:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:57,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 19:53:57,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:57,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 19:53:57,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 19:53:57,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 50 [2022-11-20 19:53:57,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 49 [2022-11-20 19:53:57,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:57,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:53:57,994 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 19:53:57,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 85 [2022-11-20 19:53:58,701 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-20 19:53:58,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 73 [2022-11-20 19:53:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:58,718 INFO L328 TraceCheckSpWp]: Computing backward predicates...