./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/rev-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/rev-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0 --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 bf03248da0b4b82491822f692d5527664b721dbcd28594bdb518a5eab7d5a1f3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 20:13:51,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:13:51,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:13:52,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:13:52,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:13:52,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:13:52,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:13:52,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:13:52,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:13:52,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:13:52,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:13:52,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:13:52,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:13:52,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:13:52,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:13:52,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:13:52,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:13:52,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:13:52,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:13:52,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:13:52,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:13:52,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:13:52,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:13:52,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:13:52,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:13:52,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:13:52,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:13:52,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:13:52,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:13:52,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:13:52,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:13:52,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:13:52,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:13:52,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:13:52,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:13:52,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:13:52,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:13:52,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:13:52,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:13:52,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:13:52,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:13:52,071 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:13:52,114 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:13:52,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:13:52,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:13:52,115 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:13:52,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:13:52,116 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:13:52,116 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:13:52,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:13:52,117 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:13:52,117 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:13:52,118 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:13:52,119 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:13:52,119 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:13:52,119 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:13:52,119 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:13:52,120 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:13:52,120 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:13:52,120 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:13:52,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:13:52,121 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:13:52,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:13:52,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:13:52,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:13:52,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:13:52,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:13:52,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:13:52,124 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:13:52,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:13:52,125 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:13:52,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:13:52,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:13:52,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:13:52,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:13:52,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:13:52,127 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:13:52,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:13:52,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:13:52,128 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:13:52,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:13:52,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:13:52,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:13:52,129 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_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf03248da0b4b82491822f692d5527664b721dbcd28594bdb518a5eab7d5a1f3 [2022-11-16 20:13:52,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:13:52,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:13:52,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:13:52,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:13:52,475 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:13:52,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-multidimensional/rev-2-n-u.c [2022-11-16 20:13:52,557 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/data/5c35f0fa8/1cce6ec3f9a84d418b6a57fded462181/FLAG3469b93fd [2022-11-16 20:13:53,079 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:13:53,080 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/sv-benchmarks/c/array-multidimensional/rev-2-n-u.c [2022-11-16 20:13:53,086 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/data/5c35f0fa8/1cce6ec3f9a84d418b6a57fded462181/FLAG3469b93fd [2022-11-16 20:13:53,472 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/data/5c35f0fa8/1cce6ec3f9a84d418b6a57fded462181 [2022-11-16 20:13:53,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:13:53,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:13:53,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:13:53,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:13:53,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:13:53,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297dd11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53, skipping insertion in model container [2022-11-16 20:13:53,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:13:53,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:13:53,686 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/sv-benchmarks/c/array-multidimensional/rev-2-n-u.c[321,334] [2022-11-16 20:13:53,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:13:53,727 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:13:53,736 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/sv-benchmarks/c/array-multidimensional/rev-2-n-u.c[321,334] [2022-11-16 20:13:53,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:13:53,758 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:13:53,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53 WrapperNode [2022-11-16 20:13:53,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:13:53,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:13:53,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:13:53,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:13:53,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,793 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-16 20:13:53,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:13:53,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:13:53,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:13:53,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:13:53,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,817 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:13:53,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:13:53,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:13:53,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:13:53,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (1/1) ... [2022-11-16 20:13:53,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:13:53,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:13:53,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:13:53,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:13:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:13:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:13:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:13:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:13:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:13:53,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:13:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:13:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:13:54,001 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:13:54,003 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:13:54,159 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:13:54,201 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:13:54,201 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 20:13:54,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:13:54 BoogieIcfgContainer [2022-11-16 20:13:54,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:13:54,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:13:54,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:13:54,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:13:54,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:13:53" (1/3) ... [2022-11-16 20:13:54,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3498236f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:13:54, skipping insertion in model container [2022-11-16 20:13:54,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:13:53" (2/3) ... [2022-11-16 20:13:54,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3498236f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:13:54, skipping insertion in model container [2022-11-16 20:13:54,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:13:54" (3/3) ... [2022-11-16 20:13:54,213 INFO L112 eAbstractionObserver]: Analyzing ICFG rev-2-n-u.c [2022-11-16 20:13:54,233 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:13:54,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:13:54,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:13:54,290 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;@3a2975de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:13:54,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:13:54,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:13:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:13:54,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:13:54,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:13:54,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:13:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:13:54,309 INFO L85 PathProgramCache]: Analyzing trace with hash -317945424, now seen corresponding path program 1 times [2022-11-16 20:13:54,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:13:54,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38294277] [2022-11-16 20:13:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:54,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:13:54,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:13:54,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553954158] [2022-11-16 20:13:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:54,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:13:54,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:13:54,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:13:54,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:13:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:13:54,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:13:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:13:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:13:54,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:13:54,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:13:54,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38294277] [2022-11-16 20:13:54,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:13:54,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553954158] [2022-11-16 20:13:54,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553954158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:13:54,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:13:54,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:13:54,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764875828] [2022-11-16 20:13:54,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:13:54,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:13:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:13:54,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:13:54,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:13:54,832 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:13:54,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:13:54,886 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-16 20:13:54,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:13:54,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 20:13:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:13:54,897 INFO L225 Difference]: With dead ends: 23 [2022-11-16 20:13:54,897 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 20:13:54,900 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 [2022-11-16 20:13:54,904 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:13:54,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:13:54,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 20:13:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-16 20:13:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:13:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-16 20:13:54,959 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2022-11-16 20:13:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:13:54,960 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-16 20:13:54,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:13:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-16 20:13:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:13:54,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:13:54,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:13:54,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:13:55,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 20:13:55,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:13:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:13:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash -810555472, now seen corresponding path program 1 times [2022-11-16 20:13:55,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:13:55,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43787675] [2022-11-16 20:13:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:55,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:13:55,195 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:13:55,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494253948] [2022-11-16 20:13:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:55,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:13:55,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:13:55,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:13:55,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:13:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:13:55,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:13:55,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:13:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:13:55,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:13:55,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:13:55,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43787675] [2022-11-16 20:13:55,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:13:55,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494253948] [2022-11-16 20:13:55,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494253948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:13:55,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:13:55,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:13:55,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006911061] [2022-11-16 20:13:55,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:13:55,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:13:55,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:13:55,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:13:55,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:13:55,328 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:13:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:13:55,393 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-16 20:13:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:13:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 20:13:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:13:55,394 INFO L225 Difference]: With dead ends: 31 [2022-11-16 20:13:55,395 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 20:13:55,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:13:55,397 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:13:55,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 9 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:13:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 20:13:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-11-16 20:13:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:13:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-16 20:13:55,405 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2022-11-16 20:13:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:13:55,405 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-16 20:13:55,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:13:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-16 20:13:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 20:13:55,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:13:55,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:13:55,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:13:55,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:13:55,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:13:55,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:13:55,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2013744500, now seen corresponding path program 1 times [2022-11-16 20:13:55,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:13:55,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816788041] [2022-11-16 20:13:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:55,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:13:55,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:13:55,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385589141] [2022-11-16 20:13:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:55,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:13:55,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:13:55,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:13:55,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:13:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:13:55,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:13:55,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:13:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:13:55,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:13:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:13:55,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:13:55,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816788041] [2022-11-16 20:13:55,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:13:55,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385589141] [2022-11-16 20:13:55,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385589141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:13:55,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460175458] [2022-11-16 20:13:55,882 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:13:55,882 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:13:55,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:13:55,894 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:13:55,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:13:56,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:56,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:56,093 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-16 20:13:56,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-16 20:13:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:56,243 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:13:56,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:13:56,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:56,447 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 36 treesize of output 38 [2022-11-16 20:13:56,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:56,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:56,963 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-16 20:13:56,964 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 3 case distinctions, treesize of input 349 treesize of output 332 [2022-11-16 20:13:57,191 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 21 treesize of output 17 [2022-11-16 20:13:57,272 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 21 treesize of output 17 [2022-11-16 20:13:57,490 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:13:58,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1460175458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:13:58,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:13:58,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-16 20:13:58,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249214316] [2022-11-16 20:13:58,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:13:58,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:13:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:13:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:13:58,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:13:58,085 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:13:58,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:13:58,499 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-16 20:13:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:13:58,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 20:13:58,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:13:58,500 INFO L225 Difference]: With dead ends: 31 [2022-11-16 20:13:58,500 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 20:13:58,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-16 20:13:58,502 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:13:58,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:13:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 20:13:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2022-11-16 20:13:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:13:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-16 20:13:58,517 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-11-16 20:13:58,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:13:58,518 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-16 20:13:58,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:13:58,518 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-16 20:13:58,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:13:58,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:13:58,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:13:58,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:13:58,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:13:58,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:13:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:13:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash -180606378, now seen corresponding path program 1 times [2022-11-16 20:13:58,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:13:58,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117064408] [2022-11-16 20:13:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:58,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:13:58,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:13:58,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107350468] [2022-11-16 20:13:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:58,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:13:58,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:13:58,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:13:58,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:13:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:13:58,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:13:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:13:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:13:58,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:13:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:13:58,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:13:58,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117064408] [2022-11-16 20:13:58,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:13:58,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107350468] [2022-11-16 20:13:58,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107350468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:13:58,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325191790] [2022-11-16 20:13:58,909 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 20:13:58,910 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:13:58,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:13:58,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:13:58,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:13:58,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,032 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:13:59,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:13:59,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,058 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 [2022-11-16 20:13:59,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,136 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 32 treesize of output 34 [2022-11-16 20:13:59,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:59,450 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-16 20:13:59,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 341 treesize of output 334 [2022-11-16 20:13:59,676 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 21 treesize of output 17 [2022-11-16 20:13:59,747 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 21 treesize of output 17 [2022-11-16 20:13:59,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2022-11-16 20:13:59,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,901 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2022-11-16 20:13:59,901 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 4 case distinctions, treesize of input 138 treesize of output 149 [2022-11-16 20:13:59,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:59,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:00,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2022-11-16 20:14:00,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:00,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:00,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:00,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:00,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:00,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:00,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:00,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:00,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2022-11-16 20:14:00,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:00,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:00,392 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:14:00,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '426#(and (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (- 4)) (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) (* (* |ULTIMATE.start_main_~n~0#1| 4) (+ (- 1) (* (- 1) |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~m~0#1|))))) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-16 20:14:00,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:14:00,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:14:00,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 20:14:00,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738446443] [2022-11-16 20:14:00,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:14:00,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:14:00,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:14:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:14:00,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:14:00,910 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:14:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:14:01,060 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-11-16 20:14:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:14:01,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 20:14:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:14:01,062 INFO L225 Difference]: With dead ends: 52 [2022-11-16 20:14:01,063 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 20:14:01,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:14:01,064 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:14:01,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 15 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:14:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 20:14:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-16 20:14:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:14:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-16 20:14:01,085 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2022-11-16 20:14:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:14:01,086 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-16 20:14:01,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:14:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-16 20:14:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 20:14:01,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:14:01,087 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:14:01,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:14:01,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:14:01,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:14:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:14:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1418857202, now seen corresponding path program 2 times [2022-11-16 20:14:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:14:01,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574929673] [2022-11-16 20:14:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:14:01,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:14:01,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:14:01,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389244219] [2022-11-16 20:14:01,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:14:01,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:14:01,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:14:01,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:14:01,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:14:01,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 20:14:01,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:14:01,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:14:01,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:14:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 20:14:01,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:14:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 20:14:01,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:14:01,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574929673] [2022-11-16 20:14:01,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:14:01,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389244219] [2022-11-16 20:14:01,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389244219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:14:01,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1838404187] [2022-11-16 20:14:01,460 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 20:14:01,460 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:14:01,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:14:01,461 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:14:01,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:14:01,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:01,556 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:14:01,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:14:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:01,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:01,577 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 [2022-11-16 20:14:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:01,627 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 32 treesize of output 34 [2022-11-16 20:14:01,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:01,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:14:01,914 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-16 20:14:01,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 341 treesize of output 334 [2022-11-16 20:14:02,120 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 21 treesize of output 17 [2022-11-16 20:14:02,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-16 20:14:02,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2022-11-16 20:14:02,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,316 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2022-11-16 20:14:02,317 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 4 case distinctions, treesize of input 138 treesize of output 149 [2022-11-16 20:14:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:02,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:02,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:02,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:02,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:14:02,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 42 [2022-11-16 20:14:02,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:14:03,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '692#(and (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (- 4)) (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) (* (* |ULTIMATE.start_main_~n~0#1| 4) (+ (- 1) (* (- 1) |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~m~0#1|))))) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-16 20:14:03,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:14:03,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:14:03,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-16 20:14:03,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8765850] [2022-11-16 20:14:03,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:14:03,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:14:03,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:14:03,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:14:03,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:14:03,265 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:14:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:14:03,355 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-11-16 20:14:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:14:03,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 20:14:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:14:03,357 INFO L225 Difference]: With dead ends: 72 [2022-11-16 20:14:03,357 INFO L226 Difference]: Without dead ends: 49 [2022-11-16 20:14:03,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:14:03,359 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:14:03,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:14:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-16 20:14:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-16 20:14:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:14:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-11-16 20:14:03,386 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2022-11-16 20:14:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:14:03,387 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-11-16 20:14:03,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:14:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-11-16 20:14:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 20:14:03,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:14:03,388 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:14:03,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:14:03,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:14:03,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:14:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:14:03,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2031697394, now seen corresponding path program 3 times [2022-11-16 20:14:03,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:14:03,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613211143] [2022-11-16 20:14:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:14:03,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:14:03,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:14:03,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541196969] [2022-11-16 20:14:03,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:14:03,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:14:03,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:14:03,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:14:03,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20a02ad1-a4df-4541-9d7b-a2b4e1a8ff09/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:14:03,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:14:03,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:14:03,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 20:14:03,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:14:03,761 INFO L321 Elim1Store]: treesize reduction 66, result has 25.0 percent of original size [2022-11-16 20:14:03,761 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 1 case distinctions, treesize of input 36 treesize of output 36 [2022-11-16 20:14:03,830 INFO L321 Elim1Store]: treesize reduction 234, result has 20.7 percent of original size [2022-11-16 20:14:03,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 80 [2022-11-16 20:14:04,009 INFO L321 Elim1Store]: treesize reduction 494, result has 17.1 percent of original size [2022-11-16 20:14:04,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 113 treesize of output 124 [2022-11-16 20:14:04,295 INFO L321 Elim1Store]: treesize reduction 712, result has 13.9 percent of original size [2022-11-16 20:14:04,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 118 treesize of output 135 [2022-11-16 20:14:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-16 20:14:05,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:14:14,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:14:14,477 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 64350392 treesize of output 60814528 [2022-11-16 20:14:54,298 WARN L233 SmtUtils]: Spent 39.82s on a formula simplification that was a NOOP. DAG size: 1697 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 20:19:06,726 WARN L233 SmtUtils]: Spent 3.56m on a formula simplification. DAG size of input: 1686 DAG size of output: 1687 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 20:25:47,483 WARN L233 SmtUtils]: Spent 5.99m on a formula simplification. DAG size of input: 1684 DAG size of output: 1686 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 20:27:03,776 WARN L233 SmtUtils]: Spent 21.85s on a formula simplification that was a NOOP. DAG size: 1656 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)